lkml.org 
[lkml]   [2007]   [Apr]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy)


    On Thu, 26 Apr 2007, Pavel Machek wrote:
    >
    > Suspend syncs caches/spins down. Freeze does not do anything.
    >
    > That's okay, I keep claiming "freeze" is subset of "suspend". Can you
    > name device where that is not true?

    Sure. Like just about any PCI device that doesn't do things on its own.

    A "freeze" does nothing at all, or perhaps shuts down the reader side
    (for something like a network controller).

    A "suspend" does "write D3 to the suspend register". Absolutely zero in
    common.

    > Remember we do
    >
    > suspend(PMSG_FREEZE)
    > atomic snapshot
    > resume()
    > write snapshot.

    AND THAT IS STUPID. It mixes up "suspend()" and creating a snapshot in
    ways that are totally idiotic. There is nothing in common!

    Linus
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-04-26 01:01    [W:4.146 / U:0.204 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site