From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Andrew Morton <akpm@osdl.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>,
Paul Mackerras <paulus@samba.org>, Jens Axboe <axboe@suse.de>,
Brian King <brking@us.ibm.com>
Subject: Re: Memory corruption & SCSI in 2.6.15
Date: Tue, 13 Dec 2005 07:57:59 +1100 [thread overview]
Message-ID: <1134421080.6989.121.camel@gaston> (raw)
In-Reply-To: <Pine.LNX.4.64.0512121250130.15597@g5.osdl.org>
On Mon, 2005-12-12 at 12:51 -0800, Linus Torvalds wrote:
> [ I applied Brian's patch, so hopefully it was the same issue, and current
> git doesn't show this problem any more ]
I'll be able to test in about 1h.
> On Tue, 13 Dec 2005, Benjamin Herrenschmidt wrote:
> >
> > > Also, enabling DEBUG_PAGEALLOC might help, but that's not available on
> > > powerpc.
> >
> > Remind me what is needed to get that working ? Unmapping of linear
> > mapping pages ? (I suppose I could do that if I also disable using large
> > pages for it).
>
> Yes, basically you'd have to allow the kernel mapping being unmapped one
> page at a time.
>
> And yes, it's inefficient. Don't use it for performance measurements ;)
Ok, I'll look into it. It's doable though it will definitely not be
fast :)
Ben.
next prev parent reply other threads:[~2005-12-12 21:01 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-12 7:13 Memory corruption & SCSI in 2.6.15 Benjamin Herrenschmidt
2005-12-12 17:17 ` Linus Torvalds
2005-12-12 18:32 ` Nathan Lynch
2005-12-12 18:51 ` Jens Axboe
2005-12-12 20:33 ` Benjamin Herrenschmidt
2005-12-12 20:51 ` Linus Torvalds
2005-12-12 20:57 ` Benjamin Herrenschmidt [this message]
2005-12-13 0:11 ` Benjamin Herrenschmidt
2005-12-12 18:09 ` Jens Axboe
2005-12-12 19:05 ` Brian King
2005-12-12 19:55 ` Linus Torvalds
2005-12-12 20:13 ` James Bottomley
2005-12-12 20:01 ` Nathan Lynch
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