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authorMichael Rubin <mrubin@google.com>2010-10-27 01:21:36 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-27 03:52:06 +0400
commit79da826aee6a10902ef411bc65864bd02102fa83 (patch)
tree9cc3602fc53f889d9b7394663d4fdaa94d13a213 /include/linux/mm.h
parent2ac390370aac4aaa49cab17f328b478cbd5b3d8d (diff)
downloadlinux-79da826aee6a10902ef411bc65864bd02102fa83.tar.xz
writeback: report dirty thresholds in /proc/vmstat
The kernel already exposes the user desired thresholds in /proc/sys/vm with dirty_background_ratio and background_ratio. But the kernel may alter the number requested without giving the user any indication that is the case. Knowing the actual ratios the kernel is honoring can help app developers understand how their buffered IO will be sent to the disk. $ grep threshold /proc/vmstat nr_dirty_threshold 409111 nr_dirty_background_threshold 818223 Signed-off-by: Michael Rubin <mrubin@google.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
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