Messages in this thread | | | Date | Fri, 27 Oct 2006 11:06:45 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 2.6.19-rc3] VFS: per-sb dentry lru list |
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On Fri, 27 Oct 2006 18:05:50 +0400 Vasily Averin <vvs@sw.ru> wrote:
> Virtuozzo/OpenVZ linux kernel team has discovered that umount/remount can last > for hours looping in shrink_dcache_sb() without much successes. Since during > shrinking s_umount semaphore is taken lots of other unrelated operations like > sync can stop working until shrink finished.
Did you consider altering shrink_dcache_sb() so that it holds onto dcache_lock and moves all the to-be-pruned dentries onto a private list in a single pass, then prunes them all outside the lock?
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