Re: [patch 02/52] fs: fix superblock iteration race

From: Chris Clayton
Date: Tue Jun 29 2010 - 16:04:46 EST

On Tuesday 29 June 2010, Linus Torvalds wrote:
> On Tue, Jun 29, 2010 at 10:52 AM, Linus Torvalds
> <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> > Look for "2.6.35-rc3 oops trying to suspend" on lkml, for example. No
> > guarantee that it's the same thing, but it's "iterate_supers()"
> > getting an oops [..]
> Also, "Oops during closedown with 2.6.35-rc3-git3" is an
> iterate_supers oops (in the jpg) and Chris says it's repeatable for
> him.
> Chris - you could try testing current -git now that I've merged Nick's
> patch. It's commit 57439f878af ("fs: fix superblock iteration race"),
> and I just pushed it out (so it might take a few minutes to mirror out
> to the public git trees, but it should be there shortly).

Well, it was repeatable this morning, but despite 30+ shutdowns this evening, I
haven't had a single oops. Perhaps I'm just not doing enough computing stuff
between startup and shutdown to create the conditions under which I got the
oopses this morning. Moreover, I've been using this kernel every day with,
maybe two or three shutdowns a day, for two weeks or so now (since just after
Linus went on vacation) with no oopses. (The kernel is -rc3 + John
Fastabend's "net: fix deliver_no_wcard regression on loopback device" patch).

I'll spend a couple of hours doing stuff and see if I can generate an oops.
Trouble is, of course, that when I pull and build the latest and greatest, I
won't know why I'm not getting oopses, assuming I don't.

I'll update y'all later.


> Linus

The more I see, the more I know. The more I know, the less I understand.
Changing Man - Paul Weller
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