Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [ 00/23] [Suspend2] Freezer Upgrade Patches | Date | Fri, 27 Jan 2006 00:10:22 +0100 |
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Hi,
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?
Greetings, Rafael
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