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    SubjectRe: [ 00/23] [Suspend2] Freezer Upgrade Patches
    Date
    Hi,

    On Friday, 27 January 2006 05:04, Nigel Cunningham wrote:
    > On Friday 27 January 2006 09:10, Rafael J. Wysocki wrote:
    > > On Thursday, 26 January 2006 04:45, Nigel Cunningham wrote:
    > > > Hi everyone.
    > > >
    > > > This set of patches represents the freezer upgrade patches from Suspend2.
    > > >
    > > > The key features of this changeset are:
    > > >
    > > > - Use of Christoph Lameter's todo list notifiers, which help with SMP
    > > > cleanness.
    > > > - Splitting the freezing of kernel and userspace processes. Freezing
    > > > currently suffers from a race because userspace processes can be
    > > > submitting work for kernel threads, thereby stopping them from
    > > > responding to freeze messages in a timely manner. The freezer can
    > > > thus give up when it doesn't really need to. (This is not normally
    > > > a problem only because load is not usually high).
    > >
    > > Could you please describe specific situation?
    >
    > The simplest example would be:
    >
    > dd if=/dev/hda of=/dev/null
    > echo disk > /sys/power/state

    Well, I don't think it's a usual kind of workload. :-)

    Anyway, could you please give some details? I mean how exactly your patch
    helps in this particular case?

    Greetings,
    Rafael

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