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    SubjectRe: [ 00/23] [Suspend2] Freezer Upgrade Patches

    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 use of bdev freezing to ensure filesystems are properly frozen,
    > thereby increasing the integrity of on-disk data in the case where
    > a resume doesn't occur. This is also helpful in the case of Suspend2,
    > where we don't atomically copy all memory, instead writing LRU pages
    > separately.

    Is this also needed when we do atomically copy all memory?


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