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2008-02-14d_path: Make d_path() use a struct pathJan Blunck12-36/+24
d_path() is used on a <dentry,vfsmount> pair. Lets use a struct path to reflect this. [akpm@linux-foundation.org: fix build in mm/memory.c] Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Bryan Wu <bryan.wu@analog.com> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14d_path: Make seq_path() use a struct path argumentJan Blunck9-17/+16
seq_path() is always called with a dentry and a vfsmount from a struct path. Make seq_path() take it directly as an argument. Signed-off-by: Jan Blunck <jblunck@suse.de> Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Use struct path in struct svc_expkeyJan Blunck2-19/+14
I'm embedding struct path into struct svc_expkey. Signed-off-by: Jan Blunck <jblunck@suse.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Acked-by: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Use struct path in struct svc_exportJan Blunck9-70/+67
I'm embedding struct path into struct svc_export. [akpm@linux-foundation.org: coding-style fixes] [ezk@cs.sunysb.edu: NFSD: fix wrong mnt_writer count in rename] Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: J. Bruce Fields <bfields@citi.umich.edu> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14d_path: Make get_dcookie() use a struct path argumentJan Blunck4-48/+37
get_dcookie() is always called with a dentry and a vfsmount from a struct path. Make get_dcookie() take it directly as an argument. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14d_path: Make proc_get_link() use a struct path argumentJan Blunck5-42/+34
proc_get_link() is always called with a dentry and a vfsmount from a struct path. Make proc_get_link() take it directly as an argument. Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14d_path: Use struct path in struct avc_audit_dataJan Blunck6-51/+43
audit_log_d_path() is a d_path() wrapper that is used by the audit code. To use a struct path in audit_log_d_path() I need to embed it into struct avc_audit_data. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: James Morris <jmorris@namei.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14d_path: kerneldoc cleanupJan Blunck1-3/+16
Move and update d_path() kernel API documentation. Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14One less parameter to __d_pathJan Blunck1-7/+5
All callers to __d_path pass the dentry and vfsmount of a struct path to __d_path. Pass the struct path directly, instead. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@infradead.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Make set_fs_{root,pwd} take a struct pathJan Blunck3-24/+20
In nearly all cases the set_fs_{root,pwd}() calls work on a struct path. Change the function to reflect this and use path_get() here. Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Use struct path in fs_structJan Blunck9-111/+87
* Use struct path in fs_struct. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Introduce path_get()Jan Blunck2-2/+16
This introduces the symmetric function to path_put() for getting a reference to the dentry and vfsmount of a struct path in the right order. Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Use path_put() in a few places instead of {mnt,d}put()Jan Blunck2-12/+6
Use path_put() in a few places instead of {mnt,d}put() Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Introduce path_put()Jan Blunck41-118/+125
* Add path_put() functions for releasing a reference to the dentry and vfsmount of a struct path in the right order * Switch from path_release(nd) to path_put(&nd->path) * Rename dput_path() to path_put_conditional() [akpm@linux-foundation.org: fix cifs] Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: <linux-fsdevel@vger.kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Steven French <sfrench@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Embed a struct path into struct nameidata instead of nd->{dentry,mnt}Jan Blunck47-402/+431
This is the central patch of a cleanup series. In most cases there is no good reason why someone would want to use a dentry for itself. This series reflects that fact and embeds a struct path into nameidata. Together with the other patches of this series - it enforced the correct order of getting/releasing the reference count on <dentry,vfsmount> pairs - it prepares the VFS for stacking support since it is essential to have a struct path in every place where the stack can be traversed - it reduces the overall code size: without patch series: text data bss dec hex filename 5321639 858418 715768 6895825 6938d1 vmlinux with patch series: text data bss dec hex filename 5320026 858418 715768 6894212 693284 vmlinux This patch: Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix cifs] [akpm@linux-foundation.org: fix smack] Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Move struct path into its own headerJan Blunck2-5/+13
Move the definition of struct path into its own header file for further patches. Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Remove path_release_on_umount()Jan Blunck3-12/+3
path_release_on_umount() should only be called from sys_umount(). I merged the function into sys_umount() instead of having in in namei.c. Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Dont touch fs_struct in usermodehelperJan Blunck1-4/+1
This test seems to be unnecessary since we always have rootfs mounted before calling a usermodehelper. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Acked-by: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Dont touch fs_struct in driversJan Blunck7-19/+6
The sound drivers and the pnpbios core test for current->root != NULL. This test seems to be unnecessary since we always have rootfs mounted before initializing the drivers. Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Jaroslav Kysela <perex@suse.cz> Acked-by: Takashi Iwai <tiwai@suse.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14vfs: add explanation of I_DIRTY_DATASYNC bitJan Kara1-2/+4
Add explanation of I_DIRTY_DATASYNC bit. Signed-off-by: Jan Kara <jack@suse.cz> Cc: Joern Engel <joern@logfs.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Include kernel.h from configfs.hBen Nizette1-0/+1
configfs.h uses the container_of macro and as such should include kernel.h. Signed-off-by: Ben Nizette <bn@niasdigital.com> Cc: Joel Becker <Joel.Becker@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14MAINTAINERS: update decnet and DLM entriesChristine Caulfield1-4/+4
Change my name & email in MAINTAINERS Signed-off-by: Christine Caulfield <christine.caulfield@googlemail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14FLAT binaries: drop BINFMT_FLAT bad header magic warningMike Frysinger1-4/+4
The warning issued by fs/binfmt_flat.c when the format handler is given a non-FLAT and non-script executable is annoying to say the least when working with FDPIC ELF objects. If you build a kernel that supports both FLAT and FDPIC ELFs on no-mmu, every time you execute an FDPIC ELF, the kernel spits out this message. While I understand a lot of newcomers to the no-mmu world screw up generation of FLAT binaries, this warning is not usable for systems that support more than just FLAT. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Bernd Schmidt <bernds_cb1@t-online.de> Acked-by: Greg Ungerer <gerg@snapgear.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14m68knommu: use tabs not spaces in cacheflush.hGreg Ungerer1-7/+7
Use tabs instead of spaces. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14m68knommu: fix profile timerMatt Waddel1-5/+12
I was looking at timers in the Coldfire system and I noticed that the CONFIG_HIGHPROFILE option seems to be a little out of date. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14m68knommu: use asflags instead of EXTRA_AFLAGSGreg Ungerer12-36/+12
Modify the extra asm flags for debugger capabilities, use asflags instead for EXTRA_AFLAGS. Suggestion from Sam Ravnborg. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14m68knommu: avoid unneccessary use of xchg() in set_mb()Greg Ungerer1-1/+1
Avoid unneccessary use of xchg() in set_mb(). Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14m68knommu: fix coldfire interrupt exit pathWalter T Gruczka1-5/+4
Remove bogus conditional jump in return from interrupt path. Reorder the code path now that is not there. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14MAINTAINERS: add linux-fsdevel to VFS entryPaul Menage1-0/+1
Add linux-fsdevel to the VFS entry in MAINTAINERS Signed-off-by: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14kernel-doc: remove fastcallHarvey Harrison1-1/+0
fastcall is gone from the tree, no need to adjust the function prototypes anymore for this. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14cris: import memset.c from newlib: fixes compile error with newer (pre4.3) gccJesper Nilsson2-391/+404
Adrian Bunk reported the following compile error with a SVN head GCC: ... CC arch/cris/arch-v10/lib/memset.o /home/bunk/linux/kernel-2.6/git/linux-2.6/arch/cris/arch-v10/lib/memset.c: In function 'memset': /home/bunk/linux/kernel-2.6/git/linux-2.6/arch/cris/arch-v10/lib/memset.c:164: error: lvalue required as increment operand /home/bunk/linux/kernel-2.6/git/linux-2.6/arch/cris/arch-v10/lib/memset.c:165: error: lvalue required as increment operand /home/bunk/linux/kernel-2.6/git/linux-2.6/arch/cris/arch-v10/lib/memset.c:166: error: lvalue required as increment operand /home/bunk/linux/kernel-2.6/git/linux-2.6/arch/cris/arch-v10/lib/memset.c:167: error: lvalue required as increment operand /home/bunk/linux/kernel-2.6/git/linux-2.6/arch/cris/arch-v10/lib/memset.c:185: error: lvalue required as increment operand /home/bunk/linux/kernel-2.6/git/linux-2.6/arch/cris/arch-v10/lib/memset.c:189: error: lvalue required as increment operand /home/bunk/linux/kernel-2.6/git/linux-2.6/arch/cris/arch-v10/lib/memset.c:192: error: lvalue required as increment operand ... etc ... This is due to the use of the construct: *((long*)dst)++ = lc; Which is no longer legal since casts don't return an lvalue. The solution is to import the implementation from newlib, which is continually autotested together with GCC mainline, and uses the construct: *(long *) dst = lc; dst += 4; With this change, the generated code actually shrinks 76 bytes since gcc notices that it can use autoincrement for the move instruction in CRIS. text data bss dec hex filename 304 0 0 304 130 memset.old.o text data bss dec hex filename 228 0 0 228 e4 memset.o Since this is an import of a file from newlib, I'm not touching the formatting or correcting any checkpatch errors. Note also that even if the two files for the CRIS v10 and CRIS v32 are identical at the moment, it might be possible to tweak the CRIS v32 version. Thus, I'm not yet folding them into the same file, at least not until we've done some research on it. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Mikael Starvik <mikael.starvik@axis.com> Cc: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14inotify: make variables static in inotify_user.cHarvey Harrison1-3/+3
inotify_max_user_instances, inotify_max_user_watches, inotify_max_queued_events can all be made static. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14fix module_update_markers() compile errorAdrian Bunk1-2/+1
This patch fixes the following compile error with CONFIG_MODULES=n caused by commit fb40bd78b0f91b274879cf5db8facd1e04b6052e: /home/bunk/linux/kernel-2.6/git/linux-2.6/kernel/marker.c: In function `marker_update_probes': /home/bunk/linux/kernel-2.6/git/linux-2.6/kernel/marker.c:627: error: too few arguments to function `module_update_markers' Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14Fix compile of swim3 as moduleTony Breeds2-6/+0
The current pmac32_defconfig fails to build with the following error: Building modules, stage 2. ERROR: "check_media_bay" [drivers/block/swim3.ko] undefined! WARNING: modpost: Found 23 section mismatch(es). To see full details build your kernel with: 'make CONFIG_DEBUG_SECTION_MISMATCH=y' make[2]: *** [__modpost] Error 1 This patch fixes that. Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-14RDMA/cma: Do not issue MRA if user rejects connection requestSean Hefty1-1/+9
There's an undesirable interaction with issuing MRA requests to increase connection timeouts and the listen backlog. When the rdma_cm receives a connection request, it queues an MRA with the ib_cm. (The ib_cm will send an MRA if it receives a duplicate REQ.) The rdma_cm will then create a new rdma_cm_id and give that to the user, which in this case is the rdma_user_cm. If the listen backlog maintained in the rdma_user_cm is full, it destroys the rdma_cm_id, which in turns destroys the ib_cm_id. The ib_cm_id generates a REJ because the state of the ib_cm_id has changed to MRA sent, versus REQ received. When the backlog is full, we just want to drop the REQ so that it is retried later. Fix this by deferring queuing the MRA until after the user of the rdma_cm has examined the connection request. Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-02-14slub: Support 4k kmallocs again to compensate for page allocator slownessChristoph Lameter2-12/+12
Currently we hand off PAGE_SIZEd kmallocs to the page allocator in the mistaken belief that the page allocator can handle these allocations effectively. However, measurements indicate a minimum slowdown by the factor of 8 (and that is only SMP, NUMA is much worse) vs the slub fastpath which causes regressions in tbench. Increase the number of kmalloc caches by one so that we again handle 4k kmallocs directly from slub. 4k page buffering for the page allocator will be performed by slub like done by slab. At some point the page allocator fastpath should be fixed. A lot of the kernel would benefit from a faster ability to allocate a single page. If that is done then the 4k allocs may again be forwarded to the page allocator and this patch could be reverted. Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-02-14slub: Fallback to kmalloc_large for failing higher order allocsChristoph Lameter1-5/+38
Slub already has two ways of allocating an object. One is via its own logic and the other is via the call to kmalloc_large to hand off object allocation to the page allocator. kmalloc_large is typically used for objects >= PAGE_SIZE. We can use that handoff to avoid failing if a higher order kmalloc slab allocation cannot be satisfied by the page allocator. If we reach the out of memory path then simply try a kmalloc_large(). kfree() can already handle the case of an object that was allocated via the page allocator and so this will work just fine (apart from object accounting...). For any kmalloc slab that already requires higher order allocs (which makes it impossible to use the page allocator fastpath!) we just use PAGE_ALLOC_COSTLY_ORDER to get the largest number of objects in one go from the page allocator slowpath. On a 4k platform this patch will lead to the following use of higher order pages for the following kmalloc slabs: 8 ... 1024 order 0 2048 .. 4096 order 3 (4k slab only after the next patch) We may waste some space if fallback occurs on a 2k slab but we are always able to fallback to an order 0 alloc. Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-02-14slub: Determine gfpflags once and not every time a slab is allocatedChristoph Lameter2-8/+12
Currently we determine the gfp flags to pass to the page allocator each time a slab is being allocated. Determine the bits to be set at the time the slab is created. Store in a new allocflags field and add the flags in allocate_slab(). Acked-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-02-14make slub.c:slab_address() staticAdrian Bunk1-1/+1
slab_address() can become static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-02-14slub: kmalloc page allocator pass-through cleanupPekka Enberg2-10/+12
This adds a proper function for kmalloc page allocator pass-through. While it simplifies any code that does slab tracing code a lot, I think it's a worthwhile cleanup in itself. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-02-14slab: avoid double initialization & do initialization in 1 placeMarcin Slusarz1-2/+1
- alloc_slabmgmt: initialize all slab fields in 1 place - slab->nodeid was initialized twice: in alloc_slabmgmt and immediately after it in cache_grow Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> CC: Christoph Lameter <clameter@sgi.com> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Christoph Lameter <clameter@sgi.com>
2008-02-14x86: cpa, fix out of date commentIngo Molnar1-2/+6
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14KVM is not seen under X86 config with latest git (32 bit compile)Balbir Singh1-2/+2
The KVM configuration is no longer visible in the latest git tree. It looks like it is selected by HAVE_SETUP_PER_CPU_AREA. I've moved HAVE_KVM to under CONFIG_X86. Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14x86: cpa: ensure page alignmentThomas Gleixner1-0/+9
the cpa API is page aligned - warn about any weird alignments. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14x86: include proper prototypes for rodata_testHarvey Harrison4-3/+8
extern should not appear in C files. Also, the definitions do not match the prototype currently, not sure what way you want to go with this, I've switched the prototype to return int, but I can see going to the void return as well. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14x86: fix gart_iommu_init()Ingo Molnar1-0/+9
When the GART table is unmapped from the kernel direct mappings during early bootup, make sure we have no leftover cachelines in it. Note: the clflush done by set_memory_np() was not enough, because clflush does not work on unmapped pages. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-14x86: EFI set_memory_x()/set_memory_uc() fixesIngo Molnar1-2/+2
The EFI-runtime mapping code changed a larger memory area than it should have, due to a pages/bytes parameter mixup. noticed by Andi Kleen. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14x86: make dump_pagetable() staticAdrian Bunk2-2/+1
dump_pagetable() can now become static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14x86: fix "BUG: sleeping function called from invalid context" in print_vma_addr()Ingo Molnar2-2/+9
Jiri Kosina reported the following deadlock scenario with show_unhandled_signals enabled: [ 68.379022] gnome-settings-[2941] trap int3 ip:3d2c840f34 sp:7fff36f5d100 error:0<3>BUG: sleeping function called from invalid context at kernel/rwsem.c:21 [ 68.379039] in_atomic():1, irqs_disabled():0 [ 68.379044] no locks held by gnome-settings-/2941. [ 68.379050] Pid: 2941, comm: gnome-settings- Not tainted 2.6.25-rc1 #30 [ 68.379054] [ 68.379056] Call Trace: [ 68.379061] <#DB> [<ffffffff81064883>] ? __debug_show_held_locks+0x13/0x30 [ 68.379109] [<ffffffff81036765>] __might_sleep+0xe5/0x110 [ 68.379123] [<ffffffff812f2240>] down_read+0x20/0x70 [ 68.379137] [<ffffffff8109cdca>] print_vma_addr+0x3a/0x110 [ 68.379152] [<ffffffff8100f435>] do_trap+0xf5/0x170 [ 68.379168] [<ffffffff8100f52b>] do_int3+0x7b/0xe0 [ 68.379180] [<ffffffff812f4a6f>] int3+0x9f/0xd0 [ 68.379203] <<EOE>> [ 68.379229] in libglib-2.0.so.0.1505.0[3d2c800000+dc000] and tracked it down to: commit 03252919b79891063cf99145612360efbdf9500b Author: Andi Kleen <ak@suse.de> Date: Wed Jan 30 13:33:18 2008 +0100 x86: print which shared library/executable faulted in segfault etc. messages the problem is that we call down_read() from an atomic context. Solve this by returning from print_vma_addr() if the preempt count is elevated. Update preempt_conditional_sti / preempt_conditional_cli to unconditionally lift the preempt count even on !CONFIG_PREEMPT. Reported-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-14hrtimer: catch expired CLOCK_REALTIME timers earlyThomas Gleixner1-0/+11
A CLOCK_REALTIME timer, which has an absolute expiry time less than the clock realtime offset calls with a negative delta into the clock events code and triggers the WARN_ON() there. This is a false positive and needs to be prevented. Check the result of timer->expires - timer->base->offset right away and return -ETIME right away. Thanks to Frans Pop, who reported the problem and tested the fixes. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Frans Pop <elendil@planet.nl>
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