diff options
| author | Boaz Harrosh <bharrosh@panasas.com> | 2011-08-04 08:54:33 +0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-08-04 19:54:38 +0400 |
| commit | 20618b21da0796115e81906d24ff1601552701b7 (patch) | |
| tree | 11f544d34a9e27ff941597018dc9ba2ae74c845e /fs/nfs | |
| parent | 88c9e42196285a7c573e2abda11a4b5037c669bc (diff) | |
| download | linux-20618b21da0796115e81906d24ff1601552701b7.tar.xz | |
pnfs-obj: Bug when we are running out of bio
When we have a situation that the number of pages we want
to encode is bigger then the size of the bio. (Which can
currently happen only when all IO is going to a single device
.e.g group_width==1) then the IO is submitted short and we
report back only the amount of bytes we actually wrote/read
and all is fine. BUT ...
There was a bug that the current length counter was advanced
before the fail to add the extra page, and we come to a situation
that the CDB length was one-page longer then the actual bio size,
which is of course rejected by the osd-target.
While here also fix the bio size calculation, in the case
that we received more then one group of devices.
CC: Stable Tree <stable@kernel.org>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/objlayout/objio_osd.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c index 9383ca7245bc..aa8663a8938f 100644 --- a/fs/nfs/objlayout/objio_osd.c +++ b/fs/nfs/objlayout/objio_osd.c @@ -589,22 +589,19 @@ static void _calc_stripe_info(struct objio_state *ios, u64 file_offset, } static int _add_stripe_unit(struct objio_state *ios, unsigned *cur_pg, - unsigned pgbase, struct _objio_per_comp *per_dev, int cur_len, + unsigned pgbase, struct _objio_per_comp *per_dev, int len, gfp_t gfp_flags) { unsigned pg = *cur_pg; + int cur_len = len; struct request_queue *q = osd_request_queue(_io_od(ios, per_dev->dev)); - per_dev->length += cur_len; - if (per_dev->bio == NULL) { - unsigned stripes = ios->layout->num_comps / - ios->layout->mirrors_p1; - unsigned pages_in_stripe = stripes * + unsigned pages_in_stripe = ios->layout->group_width * (ios->layout->stripe_unit / PAGE_SIZE); unsigned bio_size = (ios->ol_state.nr_pages + pages_in_stripe) / - stripes; + ios->layout->group_width; if (BIO_MAX_PAGES_KMALLOC < bio_size) bio_size = BIO_MAX_PAGES_KMALLOC; @@ -632,6 +629,7 @@ static int _add_stripe_unit(struct objio_state *ios, unsigned *cur_pg, } BUG_ON(cur_len); + per_dev->length += len; *cur_pg = pg; return 0; } |