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    SubjectRe: [PATCH v2] slab,slub: ignore __GFP_WAIT if we're booting or suspending
    Hi!

    > > Academic for boot, probably real for suspend/resume. There the atomic
    > > reserves could matter because the memory can be pretty full when you
    > > start suspend.
    >
    > Right, that might be something to look into, though we haven't yet
    > applied the technique for suspend & resume. My main issue with it at the
    > moment is how do I synchronize with allocations that are already
    > sleeping when changing the gfp flag mask without bloating the normal

    Well, but the problem already exists, no? If someone is already
    sleeping due to __GFP_WAIT, he'll probably sleep till the resume.

    ...well, if he's sleeping in the disk driver, I suspect driver will
    finish outstanding requests as part of .suspend().

    > I also suspect that we might want to try to make -some- amount of free
    > space before starting suspend, though of course not nearly as
    > aggressively as with std.

    We free 4MB in 2.6.30, but Rafael is removing that for 2.6.31 :-(.

    Pavel
    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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