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Date: Wed, 7 Apr 2010 09:33:08 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 #31 from Jan Kara <jack@...e.cz> 2010-04-07 09:33:00 --- (In reply to comment #29) > 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. No. The patch means that writeback thread stops doing pdflush-style writeback when it sees new work queued - work does not mean IO. It means that someone asks writeback thread to do some kind of writeout... Now I'm still not sure my patch is the right approach to the problem but I just wanted to checkout whether it at least solves the problem of this particular workload. If you still see the problem (only less often) even with ext3, then we probably have also some other work that is livelockable and thus we never get to work submitted by sync(1). I guess I'll have to find a machine with enough disks and memory to try this out... -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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