Re: [BIO] Bounce queue in bio_add_page

[Jens Axboe <axboe@suse.de>]

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