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(parent: 578b54a) | patch
md: add blktrace event for writes to superblock
authorShaohua Li <shli@fb.com>
Fri, 18 Nov 2016 17:44:08 +0000 (09:44 -0800)
committerShaohua Li <shli@fb.com>
Fri, 18 Nov 2016 17:47:57 +0000 (09:47 -0800)
commit504634f60f463e73e7d58c6810a04437da942dba
treeabdc28fb557c2158f005a6f271c60c983562c43etree | snapshot
parent578b54ade8a5e04df6edc14cb68ad0f6f491a1a1commit | diff
md: add blktrace event for writes to superblock

superblock write is an expensive operation. With raid5-cache, it can be called
regularly. Tracing to help performance debug.

Signed-off-by: Shaohua Li <shli@fb.com>
Cc: NeilBrown <neilb@suse.com>
drivers/md/md.c diff | blob | history
Domain: System / Kernel;