From: Jens Axboe <axboe@suse.de>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [BIO] Bounce queue in bio_add_page
Date: Fri, 7 Nov 2003 12:32:35 +0100 [thread overview]
Message-ID: <20031107113235.GD591@suse.de> (raw)
In-Reply-To: <20031107112833.GA5239@gondor.apana.org.au>
On Fri, Nov 07 2003, Herbert Xu wrote:
> On Fri, Nov 07, 2003 at 12:25:55PM +0100, Jens Axboe wrote:
> >
> > Could be related, someone is doing an unlock on an already unlocked
> > page. Is this the same system that saw the bounce problem initially?
>
> Yes, see http://bugs.debian.org/218566 for details.
Then there's likely just some other bug wrt bouncing. Hmm, does this
work?
===== mm/highmem.c 1.47 vs edited =====
--- 1.47/mm/highmem.c Thu Oct 9 15:03:32 2003
+++ edited/mm/highmem.c Fri Nov 7 12:32:03 2003
@@ -402,6 +402,8 @@
to->bv_len = from->bv_len;
to->bv_offset = from->bv_offset;
+ lock_page(to->bv_page);
+
if (rw == WRITE) {
char *vto, *vfrom;
--
Jens Axboe
next prev parent reply other threads:[~2003-11-08 0:06 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-01 4:46 [BIO] Bounce queue in bio_add_page Herbert Xu
2003-11-01 10:05 ` Herbert Xu
2003-11-03 12:25 ` Jens Axboe
2003-11-03 20:52 ` Herbert Xu
2003-11-04 8:49 ` Jens Axboe
2003-11-04 9:03 ` Herbert Xu
2003-11-04 9:03 ` Jens Axboe
2003-11-05 9:48 ` Jens Axboe
2003-11-06 21:09 ` Herbert Xu
2003-11-07 11:23 ` Herbert Xu
2003-11-07 11:25 ` Jens Axboe
2003-11-07 11:28 ` Herbert Xu
2003-11-07 11:32 ` Jens Axboe [this message]
2003-11-07 22:52 ` Herbert Xu
2003-11-08 9:29 ` Jens Axboe
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