linux-ext4 - [Bug 14830] When other IO is running sync times go to 10 to 20 minutes

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Message-Id: <201004062306.o36N68Ib008281@demeter.kernel.org>
Date:	Tue, 6 Apr 2010 23:06:08 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 14830] When other IO is running sync times go to 10 to 20
 minutes

https://bugzilla.kernel.org/show_bug.cgi?id=14830





--- Comment #29 from Eric Sandeen <sandeen@...hat.com>  2010-04-06 22:59:27 ---
A quick test on ext3 looks good; ext4 still seems to run away on sync :(

But I need to be a bit more methodical, and test a few more filesystems; will
let you know.

I'm not familiar enough with all the new writeback code; does this mean that a
sync will return as soon as any new IO is queued post-sync?  That seems odd if
so - but maybe I misunderstand.

Thanks,
-Eric

--- Comment #30 from Eric Sandeen <sandeen@...hat.com>  2010-04-06 23:05:57 ---
Hm maybe I spoke too soon, had a couple runs on ext3 that looked good but now
it's been syncing for many minutes ...

(this is the test where I create 4G files in a loop, let it go for a while,
then time sync - on a 16g box)

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