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2006-01-12[PATCH] death of get_thread_info/put_thread_infoAl Viro1-2/+0
{get,put}_thread_info() were introduced in 2.5.4 and never had been called by anything in the tree. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12[PATCH] mips: task_stack_page()Al Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12[PATCH] mips: task_pt_regs()Al Viro2-5/+5
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12[PATCH] scheduler cache-hot-autodetectakpm@osdl.org1-1/+0
) From: Ingo Molnar <mingo@elte.hu> This is the latest version of the scheduler cache-hot-auto-tune patch. The first problem was that detection time scaled with O(N^2), which is unacceptable on larger SMP and NUMA systems. To solve this: - I've added a 'domain distance' function, which is used to cache measurement results. Each distance is only measured once. This means that e.g. on NUMA distances of 0, 1 and 2 might be measured, on HT distances 0 and 1, and on SMP distance 0 is measured. The code walks the domain tree to determine the distance, so it automatically follows whatever hierarchy an architecture sets up. This cuts down on the boot time significantly and removes the O(N^2) limit. The only assumption is that migration costs can be expressed as a function of domain distance - this covers the overwhelming majority of existing systems, and is a good guess even for more assymetric systems. [ People hacking systems that have assymetries that break this assumption (e.g. different CPU speeds) should experiment a bit with the cpu_distance() function. Adding a ->migration_distance factor to the domain structure would be one possible solution - but lets first see the problem systems, if they exist at all. Lets not overdesign. ] Another problem was that only a single cache-size was used for measuring the cost of migration, and most architectures didnt set that variable up. Furthermore, a single cache-size does not fit NUMA hierarchies with L3 caches and does not fit HT setups, where different CPUs will often have different 'effective cache sizes'. To solve this problem: - Instead of relying on a single cache-size provided by the platform and sticking to it, the code now auto-detects the 'effective migration cost' between two measured CPUs, via iterating through a wide range of cachesizes. The code searches for the maximum migration cost, which occurs when the working set of the test-workload falls just below the 'effective cache size'. I.e. real-life optimized search is done for the maximum migration cost, between two real CPUs. This, amongst other things, has the positive effect hat if e.g. two CPUs share a L2/L3 cache, a different (and accurate) migration cost will be found than between two CPUs on the same system that dont share any caches. (The reliable measurement of migration costs is tricky - see the source for details.) Furthermore i've added various boot-time options to override/tune migration behavior. Firstly, there's a blanket override for autodetection: migration_cost=1000,2000,3000 will override the depth 0/1/2 values with 1msec/2msec/3msec values. Secondly, there's a global factor that can be used to increase (or decrease) the autodetected values: migration_factor=120 will increase the autodetected values by 20%. This option is useful to tune things in a workload-dependent way - e.g. if a workload is cache-insensitive then CPU utilization can be maximized by specifying migration_factor=0. I've tested the autodetection code quite extensively on x86, on 3 P3/Xeon/2MB, and the autodetected values look pretty good: Dual Celeron (128K L2 cache): --------------------- migration cost matrix (max_cache_size: 131072, cpu: 467 MHz): --------------------- [00] [01] [00]: - 1.7(1) [01]: 1.7(1) - --------------------- cacheflush times [2]: 0.0 (0) 1.7 (1784008) --------------------- Here the slow memory subsystem dominates system performance, and even though caches are small, the migration cost is 1.7 msecs. Dual HT P4 (512K L2 cache): --------------------- migration cost matrix (max_cache_size: 524288, cpu: 2379 MHz): --------------------- [00] [01] [02] [03] [00]: - 0.4(1) 0.0(0) 0.4(1) [01]: 0.4(1) - 0.4(1) 0.0(0) [02]: 0.0(0) 0.4(1) - 0.4(1) [03]: 0.4(1) 0.0(0) 0.4(1) - --------------------- cacheflush times [2]: 0.0 (33900) 0.4 (448514) --------------------- Here it can be seen that there is no migration cost between two HT siblings (CPU#0/2 and CPU#1/3 are separate physical CPUs). A fast memory system makes inter-physical-CPU migration pretty cheap: 0.4 msecs. 8-way P3/Xeon [2MB L2 cache]: --------------------- migration cost matrix (max_cache_size: 2097152, cpu: 700 MHz): --------------------- [00] [01] [02] [03] [04] [05] [06] [07] [00]: - 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) [01]: 19.2(1) - 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) [02]: 19.2(1) 19.2(1) - 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) [03]: 19.2(1) 19.2(1) 19.2(1) - 19.2(1) 19.2(1) 19.2(1) 19.2(1) [04]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) - 19.2(1) 19.2(1) 19.2(1) [05]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) - 19.2(1) 19.2(1) [06]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) - 19.2(1) [07]: 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) 19.2(1) - --------------------- cacheflush times [2]: 0.0 (0) 19.2 (19281756) --------------------- This one has huge caches and a relatively slow memory subsystem - so the migration cost is 19 msecs. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Cc: <wilder@us.ibm.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-12[PATCH] sched: add cacheflush() asmIngo Molnar1-0/+10
Add per-arch sched_cacheflush() which is a write-back cacheflush used by the migration-cost calibration code at bootup time. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10MIPS: R2: Try to bulletproof instruction_hazard against miss-compilation.Ralf Baechle1-5/+15
Gcc has a tradition of misscompiling the previous construct using the address of a label as argument to inline assembler. Gas otoh has the annoying difference between la and dla which are only usable for 32-bit rsp. 64-bit code, so can't be used without conditional compilation. The alterantive is switching the assembler to 64-bit code which happens to work right even for 32-bit code ... Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: R2: Fix local_irq_save()Maxime Bizon1-0/+1
local_irq_restore uses di which saves the whole status content, not just the IE bit resulting in local_irq_restore() to fail. This only happens if both CONFIG_CPU_MIPSR2 and CONFIG_IRQ_CPU are enabled. Signed-off-by: Maxime Bizon <mbizon@freebox.fr> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: Namespace pollution: dump_regs() -> elf_dump_regs()Al Viro1-2/+2
dump_regs() is used by a bunch of drivers for their internal stuff; renamed mips instance (one that is seen in system-wide headers) to elf_dump_regs() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: Au1550: Fix OHCI memory map sizeSergei Shtylyov1-2/+5
USB OpenHCI host controller on Au1550 only decodes memory addresses from 0x14020000 to 0x1407FFFF according to the databook, which gives 0x60000 (on the prior Au1x00 chips the map size was 1MB). Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Acked-by: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10Update Yoichi Yuasa's email address.Ralf Baechle11-11/+11
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: Reorganize ISA constants strictly as bitmasks.Ralf Baechle2-31/+31
Signed-off-by: Ralf Baechle <ralf@ongar.mips.com>
2006-01-10MIPS: Introduce machinery for testing for MIPSxxR1/2.Ralf Baechle9-1/+62
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: Rename MIPS_CPU_ISA_M{32,64} -> MIPS_CPU_ISA_M{32,64}R1.Ralf Baechle1-10/+7
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: Get rid of atomic_lock.Ralf Baechle1-22/+21
It was resulting in build errors for some configurations. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: DSP: Put mask field into the right place.Ralf Baechle1-1/+1
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: DSP: Set all register masks to 0x3ff.Ralf Baechle1-3/+3
0x2ff was a typo and the value 0x1f of DSP_MASK was refering to an old version of the documentation. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: Fix mdelay(1) for 64bit kernel with HZ == 1000Atsushi Nemoto1-4/+2
mdelay(1) (i.e. udelay(1000)) does not work correctly due to overflow. 1000 * 0x004189374BC6A7f0 = 0x10000000000000180 (>= 2**64) 0x004189374BC6A7ef (0x004189374BC6A7f0 - 1) is OK and it is exactly same as catchall case (0x8000000000000000UL / (500000 / HZ)). Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: DSP: eleminate used_dsp.Ralf Baechle1-1/+0
used_dsp was meant to be used like used_math - but since the FPU context is small and lazy context switching is a stupid idea on multiprocessors this idea only got halfway implemented and those bits are were now breaking ptrace. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-10MIPS: DSP: Context switch the DSPcontrol register also.Ralf Baechle1-0/+2
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-01-09[PATCH] mutex subsystem, add default include/asm-*/mutex.h filesArjan van de Ven1-0/+9
add the per-arch mutex.h files for the remaining architectures. We default to asm-generic/mutex-dec.h, because that performs quite well on most arches. Arches that do not have atomic decrement/increment instructions should switch to mutex-xchg.h instead. Arches can also provide their own implementation for the mutex fastpath primitives. Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2006-01-09[PATCH] mutex subsystem, add atomic_xchg() to all archesIngo Molnar1-0/+1
add atomic_xchg() to all the architectures. Needed by the new mutex code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org>
2006-01-08[PATCH] Kill L1_CACHE_SHIFT_MAXRavikiran G Thirumalai1-1/+0
Kill L1_CACHE_SHIFT from all arches. Since L1_CACHE_SHIFT_MAX is not used anymore with the introduction of INTERNODE_CACHE, kill L1_CACHE_SHIFT_MAX. Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-06[PATCH] mips: remove include/asm-mips/riscos-syscall.hDomen Puncer1-979/+0
Remove nowhere referenced file ("grep riscos -r ." didn't find anything). Signed-off-by: Domen Puncer <domen@coderock.org> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-06[PATCH] atomic_long_t & include/asm-generic/atomic.h V2Christoph Lameter1-0/+1
Several counters already have the need to use 64 atomic variables on 64 bit platforms (see mm_counter_t in sched.h). We have to do ugly ifdefs to fall back to 32 bit atomic on 32 bit platforms. The VM statistics patch that I am working on will also make more extensive use of atomic64. This patch introduces a new type atomic_long_t by providing definitions in asm-generic/atomic.h that works similar to the c "long" type. Its 32 bits on 32 bit platforms and 64 bits on 64 bit platforms. Also cleans up the determination of the mm_counter_t in sched.h. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-06[PATCH] madvise(MADV_REMOVE): remove pages from tmpfs shm backing storeBadari Pulavarty1-0/+1
Here is the patch to implement madvise(MADV_REMOVE) - which frees up a given range of pages & its associated backing store. Current implementation supports only shmfs/tmpfs and other filesystems return -ENOSYS. "Some app allocates large tmpfs files, then when some task quits and some client disconnect, some memory can be released. However the only way to release tmpfs-swap is to MADV_REMOVE". - Andrea Arcangeli Databases want to use this feature to drop a section of their bufferpool (shared memory segments) - without writing back to disk/swap space. This feature is also useful for supporting hot-plug memory on UML. Concerns raised by Andrew Morton: - "We have no plan for holepunching! If we _do_ have such a plan (or might in the future) then what would the API look like? I think sys_holepunch(fd, start, len), so we should start out with that." - Using madvise is very weird, because people will ask "why do I need to mmap my file before I can stick a hole in it?" - None of the other madvise operations call into the filesystem in this manner. A broad question is: is this capability an MM operation or a filesytem operation? truncate, for example, is a filesystem operation which sometimes has MM side-effects. madvise is an mm operation and with this patch, it gains FS side-effects, only they're really, really significant ones." Comments: - Andrea suggested the fs operation too but then it's more efficient to have it as a mm operation with fs side effects, because they don't immediatly know fd and physical offset of the range. It's possible to fixup in userland and to use the fs operation but it's more expensive, the vmas are already in the kernel and we can use them. Short term plan & Future Direction: - We seem to need this interface only for shmfs/tmpfs files in the short term. We have to add hooks into the filesystem for correctness and completeness. This is what this patch does. - In the future, plan is to support both fs and mmap apis also. This also involves (other) filesystem specific functions to be implemented. - Current patch doesn't support VM_NONLINEAR - which can be addressed in the future. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Andrea Arcangeli <andrea@suse.de> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Ulrich Drepper <drepper@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds1-1/+0
2006-01-03[FLS64]: generic versionStephen Hemminger1-1/+1
Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-01gitignore: asm-offsets.hBrian Gerst1-1/+0
Ignore asm-offsets.h for all arches. Signed-off-by: Brian Gerst <bgerst@didntduck.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2005-12-15[PATCH] ide: AU1200 IDE updateJordan Crouse1-9/+8
Changes here include removing all of CONFIG_PM while it is being repeatedly smacked with a lead pipe, moving the BURSTMODE param to a #define (it should be defined almost always anyway), fixing the rqsize stuff, pulling ide_ioreg_t, and general cleanups and whatnot. Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2005-12-15[PATCH] ide: core modifications for AU1200Jordan Crouse1-5/+0
bart: slightly modified by me Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2005-12-01[MIPS] Qemu: Qemu is emulating a 1193.182kHz i8254 PIC.Ralf Baechle1-0/+16
From Daniel Jacobowitz <dan@debian.org>. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] SEAD: More build fixes.Ralf Baechle1-2/+9
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] SEAD: Delete seadint_init() prototype.Ralf Baechle1-2/+0
There is no definition for seadint_init() and the unprotected prototype breaks compilation of assembler files. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] JMR3927: Fix include wrapper symbol.Ralf Baechle1-3/+3
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] Fix documentation typos.Arnaud Giersch1-6/+8
Signed-off-by: Arnaud Giersch <arnaud.giersch@free.fr> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] Add const qualifier to writes##bwlq.Arnaud Giersch1-3/+3
Add const qualifier to parameter addr of writes##bwlq. Signed-off-by: Arnaud Giersch <arnaud.giersch@free.fr> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] IP32: Fix sparse warnings.Arnaud Giersch2-2/+2
Add __iomem qualifier to crime and mace pointers. Signed-off-by: Arnaud Giersch <arnaud.giersch@free.fr> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] IP32 Fix and complete IP32 parport definitionsArnaud Giersch1-16/+26
Fix, complete, and indent IP32 parport definitions. Definition were wrong for CTXINUSE and DMACTIVE (1-bit shift). Add macros DATA_BOUND, DATALEN_SHIFT, and CTRSHIFT. Signed-off-by: Arnaud Giersch <arnaud.giersch@free.fr> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] JMR3927: Undo accidental rename.Ralf Baechle1-0/+0
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] IP32: No need to include <asm/io.h>.Ralf Baechle1-3/+4
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] Add missing arch defines for the Alchemy MTD driver.Ralf Baechle4-0/+19
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-17[MIPS] Delete duplicate definitions of break codes.Ralf Baechle1-21/+0
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-13[PATCH] atomic: inc_not_zeroNick Piggin1-0/+19
Introduce an atomic_inc_not_zero operation. Make this a special case of atomic_add_unless because lockless pagecache actually wants atomic_inc_not_negativeone due to its offset refcount. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-13[PATCH] atomic: cmpxchgNick Piggin1-0/+2
Introduce an atomic_cmpxchg operation. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds10-49/+95
2005-11-07Redefine outs[wl] for ide_outs[wl].Atsushi Nemoto1-0/+4
Add missing bits to fix D-cache aliasing problem in the PIO IDE driver. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-07Delete duplicate definitions.Ralf Baechle1-4/+0
This reverts 8f91ed6c2fec8cb746e4dc86a79247162b4c5a7a. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-07Define MAX_UDELAY_MSAtsushi Nemoto1-0/+9
If HZ was 1000, mdelay(2) cause overflow on multiplication in __udelay. We should define MAX_UDELAY_MS properly to prevent this. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-07Use rtc_lock to protect RTC operationsAtsushi Nemoto2-2/+25
Many RTC routines were not protected against each other, so there are potential races, for example, ntp-update against /dev/rtc. This patch fixes them using rtc_lock. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-11-07Remove mips_rtc_lockAtsushi Nemoto1-7/+0
The mips_rtc_lock is no longer needed because RTC operations should be protected already by other mechanism. (rtc_lock, local_irq_save, etc.) Also, locking whole rtc_get_time/rtc_set_time should be avoided while some RTC routines might take very long time (a few seconds). Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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