tree 3737b88a25b3fb1e3347cd1c4c274336aee6a462
parent f67055780caac6a99f43834795c43acf99eba6a6
author NeilBrown <neilb@suse.de> 1143451092 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1143477902 -0800

[PATCH] md: Only checkpoint expansion progress occasionally

Instead of checkpointing at each stripe, only checkpoint when a new write
would overwrite uncheckpointed data.  Block any write to the uncheckpointed
area.  Arbitrarily checkpoint at least every 3Meg.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>