diff options
| author |   Peter Zijlstra <a.p.zijlstra@chello.nl> | 2008-04-30 00:54:32 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:49 -0700 |
| commit | cf0ca9fe5dd9e3693d935757a7b2fc50fc576554 (patch) | |
| tree | c795c5271eda9fc67579fa3176c646b892dfdb41 /include | |
| parent | pidns: make pid->level and pid_ns->level unsigned (diff) | |
| download | linux-dev-cf0ca9fe5dd9e3693d935757a7b2fc50fc576554.tar.xz linux-dev-cf0ca9fe5dd9e3693d935757a7b2fc50fc576554.zip | |
mm: bdi: export BDI attributes in sysfs
Provide a place in sysfs (/sys/class/bdi) for the backing_dev_info object.
This allows us to see and set the various BDI specific variables.
In particular this properly exposes the read-ahead window for all relevant
users and /sys/block/<block>/queue/read_ahead_kb should be deprecated.
With patient help from Kay Sievers and Greg KH
[mszeredi@suse.cz]
- split off NFS and FUSE changes into separate patches
- document new sysfs attributes under Documentation/ABI
- do bdi_class_init as a core_initcall, otherwise the "default" BDI
won't be initialized
- remove bdi_init_fmt macro, it's not used very much
[akpm@linux-foundation.org: fix ia64 warning]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Acked-by: Greg KH <greg@kroah.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/backing-dev.h | 9 | ||||
| -rw-r--r-- | include/linux/writeback.h | 3 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index b66fa2bdfd9c..6d513666d45c 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -11,9 +11,11 @@ #include <linux/percpu_counter.h> #include <linux/log2.h> #include <linux/proportions.h> +#include <linux/kernel.h> #include <asm/atomic.h> struct page; +struct device; /* * Bits in backing_dev_info.state @@ -48,11 +50,18 @@ struct backing_dev_info { struct prop_local_percpu completions; int dirty_exceeded; + + struct device *dev; }; int bdi_init(struct backing_dev_info *bdi); void bdi_destroy(struct backing_dev_info *bdi); +int bdi_register(struct backing_dev_info *bdi, struct device *parent, + const char *fmt, ...); +int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev); +void bdi_unregister(struct backing_dev_info *bdi); + static inline void __add_bdi_stat(struct backing_dev_info *bdi, enum bdi_stat_item item, s64 amount) { diff --git a/include/linux/writeback.h b/include/linux/writeback.h index b7b3362f7717..f462439cc288 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -114,6 +114,9 @@ struct file; int dirty_writeback_centisecs_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); +void get_dirty_limits(long *pbackground, long *pdirty, long *pbdi_dirty, + struct backing_dev_info *bdi); + void page_writeback_init(void); void balance_dirty_pages_ratelimited_nr(struct address_space *mapping, unsigned long nr_pages_dirtied); |