Re: [Bug #14141] order 2 page allocation failures in iwlagn
From: Christoph Hellwig
Date: Mon Oct 19 2009 - 13:01:54 EST
On Tue, Oct 20, 2009 at 01:18:15AM +0900, Chris Mason wrote:
> Waiting doesn't make it synchronous from the elevator point of view ;)
> If you're using WB_SYNC_NONE, it's a async write. WB_SYNC_ALL makes it
> a sync write. I only see WB_SYNC_NONE in vmscan.c, so we should be
> using the async congestion wait. (the exception is xfs which always
> does async writes).
That's only because those people who did the global sweep did not bother
to convert it or even tell the list about it. I have a patch in my
QA queue to change it..
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