On 05/11/2012 04:36 PM, Jens Axboe wrote:
On 05/11/2012 03:49 PM, Bernd Schubert wrote:
The number of bio_get_nr_vecs() is passed down via bio_alloc() to
bvec_alloc_bs(), which fails the bio allocation if
nr_iovecs> BIO_MAX_PAGES. For the underlying caller this causes an
unexpected bio allocation failure.
Limiting to queue_max_segments() is not sufficient, as max_segments
also might be very large.
bvec_alloc_bs(gfp_mask, nr_iovecs, ) => NULL when nr_iovecs> BIO_MAX_PAGES
bio_alloc_bioset(gfp_mask, nr_iovecs, ...)
bio_alloc(GFP_NOIO, nvecs)
xfs_alloc_ioend_bio()
Thanks, looks sane. Applied.
Great, thanks! Should we CC linux-stable for commit
5abebfdd02450fa1349daacf242e70b3736581e3 and this one, as I got a hard
kernel panic?
Thanks,
Bernd
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