linux-kernel - Re: [PATCH v8]: Hibernation: lower/better control the amount of pages used for buffering

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Message-ID: <2cbc3801-3ab0-4ef6-84cd-d69a23ff4dcc@email.android.com>
Date:	Sun, 08 Apr 2012 10:14:59 +1000
From:	Bojan Smojver <bojan@...ursive.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	linux-kernel@...r.kernel.org,
	Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v8]: Hibernation: lower/better control the amount of pages used for buffering

Bojan Smojver <bojan@...ursive.com> wrote:

>I just got confirmation that the patch indeed solves the hang problem
>in
>3.2 and page allocation errors in 3.3:
>
>https://bugzilla.redhat.com/show_bug.cgi?id=785384#c68
>
>Could you please queue it up for 3.4 and then stable.

Please ignore this request. As it turns out, the hangs are still there, it just takes a bit longer to trigger.

We must be leaking pages during hibernation somehow, although I cannot replicate this on my system. I think I will have to revert I/O improvements on image save for now or maybe replace then with a bit of async I/O in a separate thread to at least retain a bit of the performance gains.

Will keep you posted.

-- 
Bojan
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