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Peter Zijlstra cf0ca9fe5d 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>
2008-04-30 08:29:49 -07:00
..
as-iosched.c
blk-barrier.c block: rename and export rq_init() 2008-04-29 14:48:55 +02:00
blk-core.c block: add large command support 2008-04-29 14:48:55 +02:00
blk-exec.c
blk-ioc.c
blk-map.c block: add dma alignment and padding support to blk_rq_map_kern 2008-04-29 09:50:34 +02:00
blk-merge.c block: make queue flags non-atomic 2008-04-29 14:48:33 +02:00
blk-settings.c block: make queue flags non-atomic 2008-04-29 14:48:33 +02:00
blk-sysfs.c block: Skip I/O merges when disabled 2008-04-29 14:48:55 +02:00
blk-tag.c block: make queue flags non-atomic 2008-04-29 14:48:33 +02:00
blk.h block: rename and export rq_init() 2008-04-29 14:48:55 +02:00
blktrace.c
bsg.c [SCSI] bsg: add release callback support 2008-04-22 15:16:32 -05:00
cfq-iosched.c
compat_ioctl.c
deadline-iosched.c
elevator.c block: Skip I/O merges when disabled 2008-04-29 14:48:55 +02:00
genhd.c mm: bdi: export BDI attributes in sysfs 2008-04-30 08:29:49 -07:00
ioctl.c
Kconfig
Kconfig.iosched
Makefile
noop-iosched.c
scsi_ioctl.c block: no need to initialize rq->cmd with blk_get_request 2008-04-29 14:48:55 +02:00