Messages in this thread | | | Date | Mon, 31 Jul 2006 22:54:54 -0700 | From | Andrew Morton <> | Subject | Re: [BLOCK] bh: Ensure bh fits within a page |
| |
On Tue, 1 Aug 2006 15:02:59 +1000 Herbert Xu <herbert@gondor.apana.org.au> wrote:
> On Mon, Jul 31, 2006 at 09:04:18PM -0700, Andrew Morton wrote: > > > > Could we have a more detailed description? > > Sure, this particular instance is in journal_write_metadata_buffer > where the bh may be constructed from kmalloc memory (search for the > call to jbd_rep_kmalloc). Because the memory returned by kmalloc > may straddle a page (when slab debugging is enabled that is), this > causes a broken bh to be injected into submit_bh. >
Crap, that's hard to fix. Am I allowed to blame submit_bh()? ;)
uhm, we don't want to lose kmalloc redzoning, so I guess we need to create on-demand ext3-private slab caches for 1024, 2048, and 4096 bytes. With the appropriate slab flags to defeat the redzoning. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |