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    SubjectRe: [linux-pm] [PATCH] Remove process freezer from suspend to RAM pathway
    On Tue, 3 Jul 2007, Matthew Garrett wrote:

    > Suspend to RAM on a machine with / on a fuse filesystem turns out to be
    > a screaming nightmare - either the suspend fails because syslog (for
    > instance) can't be frozen, or the machine deadlocks for some other
    > reason I haven't tracked down. We could "fix" fuse, or alternatively we
    > could do what we do for suspend to RAM on other platforms (PPC and APM)
    > and just not use the freezer.

    Quite apart from the sync() matter, _any_ synchronous call to a FUSE
    filesystem during STR will cause trouble. Even if the user task
    implementing the filesystem isn't frozen, when it tries to carry out
    some I/O to a suspended device it will either:

    block until the system wakes up, or

    cause the suspend to abort.

    Neither outcome is desirable.

    Alan Stern

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