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Date: Mon, 22 Jul 2013 17:32:48 -0700 From: Linus Torvalds <torvalds@...ux-foundation.org> To: Colin Cross <ccross@...roid.com> Cc: Michael Leun <lkml20130126@...ton.leun.net>, lkml <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>, "Rafael J. Wysocki" <rjw@...k.pl>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Mandeep Singh Baines <msb@...omium.org>, Oleg Nesterov <oleg@...hat.com>, linux-nfs <linux-nfs@...r.kernel.org>, Linux PM list <linux-pm@...r.kernel.org>, netdev <netdev@...r.kernel.org>, Tejun Heo <tj@...nel.org>, Darren Hart <dvhart@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>, Randy Dunlap <rdunlap@...radead.org>, Al Viro <viro@...iv.linux.org.uk> Subject: Re: 3.11-rc regression bisected: s2disk does not work (was Re: [PATCH v3 13/16] futex: use freezable blocking call) On Mon, Jul 22, 2013 at 4:55 PM, Colin Cross <ccross@...roid.com> wrote: > > I think the right solution is to add a flag to the freezing task that > marks it unfreezable. I think PF_NOFREEZE would work, although it is > normally used on kernel threads, can you see if the attached patch > helps? Hmm. That does seem to be the right thing to do, but I wonder about the *other* callers of freeze_processes() IOW, kexec and friends. So maybe we should do this in {freeze|thaw}_processes() itself, and just make the rule be that the caller of freeze_processes() itself is obviously not frozen, and has to be the same one that then thaws things? Colin? Rafael? Comments? Linus -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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