Messages in this thread | | | Date | Tue, 28 Jul 2009 14:49:38 -0700 | Subject | Re: Bug in kernel 2.6.31, Slow wb_kupdate writeout | From | Martin Bligh <> |
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> An interesting recent-ish change is "writeback: speed up writeback of > big dirty files." When I revert the change to __sync_single_inode the > problem appears to go away and background writeout proceeds at disk > speed. Interestingly, that code is in the git commit [2], but not in > the post to LKML. [3] This is may not be the fix, but it makes this > test behave better.
I'm fairly sure this is not fixing the root cause - but putting it at the head rather than the tail of the queue causes the error not to starve wb_kupdate for nearly so long - as long as we keep the queue full, the bug is hidden.
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