Displaying 3 results from an estimated 3 matches for "bio_max_pag".
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bio_max_pages
2013 Jun 21
5
[PATCH 3/4] xen-blkback: check the number of iovecs before allocating a bios
With the introduction of indirect segments we can receive requests
with a number of segments bigger than the maximum number of allowed
iovecs in a bios, so make sure that blkback doesn't try to allocate a
bios with more iovecs than BIO_MAX_PAGES
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
drivers/block/xen-blkback/blkback.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback...
2008 May 30
5
[PATCH 1/4] pvSCSI driver
pvSCSI backend driver
Signed-off-by: Tomonari Horikoshi <t.horikoshi@jp.fujitsu.com>
Signed-off-by: Jun Kamada <kama@jp.fujitsu.com>
-----
Jun Kamada
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel
2007 Jan 02
0
[PATCH 1/4] add scsi-target and IO_CMD_EPOLL_WAIT patches
...SIZE);
++ end = ((unsigned long)ubuf + map_len + PAGE_SIZE - 1)
++ >> PAGE_SHIFT;
++ start = (unsigned long)ubuf >> PAGE_SHIFT;
+
+- if (!IS_ERR(bio)) {
+- rq->bio = rq->biotail = bio;
+- blk_rq_bio_prep(q, rq, bio);
++ /*
++ * A bad offset could cause us to require BIO_MAX_PAGES + 1
++ * pages. If this happens we just lower the requested
++ * mapping len by a page so that we can fit
++ */
++ if (end - start > BIO_MAX_PAGES)
++ map_len -= PAGE_SIZE;
+
+- rq->buffer = rq->data = NULL;
+- rq->data_len = len;
+- return 0;
++ ret = __blk_rq_map_user(...