lkml.org 
[lkml]   [2007]   [Jul]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-07-03 18:05    [from the cache]
©2003-2011 Jasper Spaans