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From: "Henrik Rydberg" <rydberg@euromail.se>
To: Mel Gorman <mgorman@suse.de>
Cc: Jan Kara <jack@suse.cz>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	linux-mm@kvack.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Oops in 3.7-rc8 isolate_free_pages_block()
Date: Thu, 6 Dec 2012 18:22:25 +0100	[thread overview]
Message-ID: <20121206172225.GA978@polaris.bitmath.org> (raw)
In-Reply-To: <20121206161934.GA17258@suse.de>

> Still travelling and am not in a position to test this properly :(.
> However, this bug feels very similar to a bug in the migration scanner where
> a pfn_valid check is missed because the start is not aligned.  Henrik, when
> did this start happening? I would be a little surprised if it started between
> 3.6 and 3.7-rcX but maybe it's just easier to hit now for some reason. How
> reproducible is this? Is there anything in particular you do to trigger the
> oops? Does the following patch help any? It's only compile tested I'm afraid.

I managed to trigger the path several times with a small
memory-intensive program, and since I am still here,

    Tested-by: Henrik Rydberg <rydberg@euromail.se>

Thanks!
Henrik

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WARNING: multiple messages have this Message-ID (diff)
From: "Henrik Rydberg" <rydberg@euromail.se>
To: Mel Gorman <mgorman@suse.de>
Cc: Jan Kara <jack@suse.cz>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	linux-mm@kvack.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Oops in 3.7-rc8 isolate_free_pages_block()
Date: Thu, 6 Dec 2012 18:22:25 +0100	[thread overview]
Message-ID: <20121206172225.GA978@polaris.bitmath.org> (raw)
In-Reply-To: <20121206161934.GA17258@suse.de>

> Still travelling and am not in a position to test this properly :(.
> However, this bug feels very similar to a bug in the migration scanner where
> a pfn_valid check is missed because the start is not aligned.  Henrik, when
> did this start happening? I would be a little surprised if it started between
> 3.6 and 3.7-rcX but maybe it's just easier to hit now for some reason. How
> reproducible is this? Is there anything in particular you do to trigger the
> oops? Does the following patch help any? It's only compile tested I'm afraid.

I managed to trigger the path several times with a small
memory-intensive program, and since I am still here,

    Tested-by: Henrik Rydberg <rydberg@euromail.se>

Thanks!
Henrik

  parent reply	other threads:[~2012-12-06 17:20 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-06  9:17 Oops in 3.7-rc8 isolate_free_pages_block() Henrik Rydberg
2012-12-06 14:48 ` Jan Kara
2012-12-06 14:48   ` Jan Kara
2012-12-06 15:22   ` Henrik Rydberg
2012-12-06 15:22     ` Henrik Rydberg
2012-12-06 16:10     ` Linus Torvalds
2012-12-06 16:10       ` Linus Torvalds
2012-12-06 16:35       ` Mel Gorman
2012-12-06 16:35         ` Mel Gorman
2012-12-06 16:19   ` Mel Gorman
2012-12-06 16:19     ` Mel Gorman
2012-12-06 16:50     ` Linus Torvalds
2012-12-06 16:50       ` Linus Torvalds
2012-12-06 17:55       ` Mel Gorman
2012-12-06 17:55         ` Mel Gorman
2012-12-06 18:19         ` Linus Torvalds
2012-12-06 18:19           ` Linus Torvalds
2012-12-06 18:21           ` Mel Gorman
2012-12-06 18:21             ` Mel Gorman
2012-12-06 18:32           ` Henrik Rydberg
2012-12-06 18:32             ` Henrik Rydberg
2012-12-06 18:41             ` Linus Torvalds
2012-12-06 18:41               ` Linus Torvalds
2012-12-06 19:01               ` Mel Gorman
2012-12-06 19:01                 ` Mel Gorman
2012-12-06 19:28               ` Henrik Rydberg
2012-12-06 19:28                 ` Henrik Rydberg
2012-12-06 19:38                 ` Linus Torvalds
2012-12-06 19:38                   ` Linus Torvalds
2012-12-06 21:39                   ` Henrik Rydberg
2012-12-06 21:39                     ` Henrik Rydberg
2012-12-07  8:32                   ` Mel Gorman
2012-12-07  8:32                     ` Mel Gorman
2012-12-06 16:58     ` Henrik Rydberg
2012-12-06 16:58       ` Henrik Rydberg
2012-12-06 17:22     ` Henrik Rydberg [this message]
2012-12-06 17:22       ` Henrik Rydberg

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