linux-ext4 - [Bug 15906] serious performance regression in "umount" on ext4 over LVM

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Date:	Wed, 5 May 2010 00:28:46 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 15906] serious performance regression in "umount" on ext4 over
 LVM

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





--- Comment #9 from Kees Cook <kees@...flux.net>  2010-05-05 00:28:42 ---
Well, it seems to me that there is something wrong somewhere in here since
"sync; umount" takes seconds and "umount" alone takes minutes.  I can, however,
confirm that adding "-o nobarrier" causes the symptom to vanish.

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