linux-ext4 - [Bug 15906] performance regression in "umount" of filesystems using barriers

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Message-Id: <201005060710.o467AaT4023613@demeter.kernel.org>
Date:	Thu, 6 May 2010 07:10:36 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 15906] performance regression in "umount" of filesystems using
 barriers

https://bugzilla.kernel.org/show_bug.cgi?id=15906





--- Comment #19 from Jens Axboe <axboe@...nel.dk>  2010-05-06 07:10:30 ---
BTW, I believe that Chris has observed this problem on btrfs as well. If you
have a lot of dirty inodes and do the umount, all the writeback will be done
with WB_SYNC_ALL which will cause a log commit for each on btrfs. End result is
the same, umount runs a lot slower than it otherwise should have.

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