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    SubjectRe: [PATCH] Remove process freezer from suspend to RAM pathway
    Date
    Hi.

    On Friday 06 July 2007 19:09:43 Miklos Szeredi wrote:
    > > > > Moreover, if FUSE implements syncing, then the sync from within the
    freezer
    > > > > will almost certainly deadlock.
    > > >
    > > > Rafael, think positively: by the time fuse implements sync(), the
    > > > freezer will be long gone ;)
    > >
    > > Now you are entering really dangerous territory.
    > > If you can implement a meaningfull sync method, you must have dirty
    > > pages in the page cache. That means you are in the page freeing path
    > > of the vm. Then we are in real trouble. Don't even think about it.
    >
    > VM induced deadlocks are real nasty. I have thought about them a lot
    > already. Suspend shouldn't introduce any big surprises.

    Suspend isn't introducing the surprises. Fuse is. It creates the potential
    deadlocks simply by existing (this isn't suspend or hibernate specific).

    Nigel
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