linux-kernel - Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway

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Message-Id: <200707051614.19300.rjw@sisk.pl>
Date:	Thu, 5 Jul 2007 16:14:17 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	pavel@....cz, oliver@...kum.org, paulus@...ba.org,
	stern@...land.harvard.edu, johannes@...solutions.net,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	mjg59@...f.ucam.org, benh@...nel.crashing.org
Subject: Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway

On Thursday, 5 July 2007 15:50, Miklos Szeredi wrote:
> > > > Don't you think, however, that it can be modified a little to play well,
> > > > for example, with the freezer?
> > > 
> > > I could stick a couple of try_to_freeze()s into fuse, and that would
> > > make suspend failure less likely.  But making problems less easy to
> > > reproduce is not a good thing.
> > 
> > So, how about eliminating them?
> 
> That can't be done just within fuse, a process might be sleeping on a
> VFS mutex.  Do we want to hack VFS as well?

No.

> I guess I know your answer.  But it ain't gonna work.  Suspend code
> really doesn't belong in VFS, and I'm pretty sure the maintainers of
> that little piece of code would agree with me on this.

Surprise, surprise.  Not that I'm scared of the VFS maintainers, though. ;-)

Greetings,
Rafael


-- 
"Premature optimization is the root of all evil." - Donald Knuth
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