Re: [Bug #14141] order 2 page allocation failures in iwlagn

Christoph Hellwig
2009-10-19T17:01:37Z

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..