Messages in this thread |  | | | Date | Tue, 3 Jul 2007 12:03:33 -0400 (EDT) | | From | Alan Stern <> | | Subject | Re: [linux-pm] [PATCH] Remove process freezer from suspend to RAM pathway |
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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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