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authorIlya Dryomov <idryomov@gmail.com>2016-02-09 19:50:15 +0300
committerIlya Dryomov <idryomov@gmail.com>2016-03-25 20:51:43 +0300
commit3f1af42ad0fad8a12242233dd0d9fc42f5e83415 (patch)
treeeabe7d5ed3f48fb23c2caa777a4436df67103b29 /drivers
parent9e767adbd3961760af5d56efe45fa8217cce7db6 (diff)
downloadlinux-3f1af42ad0fad8a12242233dd0d9fc42f5e83415.tar.xz
libceph: enable large, variable-sized OSD requests
Turn r_ops into a flexible array member to enable large, consisting of up to 16 ops, OSD requests. The use case is scattered writeback in cephfs and, as far as the kernel client is concerned, 16 is just a made up number. r_ops had size 3 for copyup+hint+write, but copyup is really a special case - it can only happen once. ceph_osd_request_cache is therefore stuffed with num_ops=2 requests, anything bigger than that is allocated with kmalloc(). req_mempool is backed by ceph_osd_request_cache, which means either num_ops=1 or num_ops=2 for use_mempool=true - all existing users (ceph_writepages_start(), ceph_osdc_writepages()) are fine with that. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/block/rbd.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 94f31bde73e8..08018710f363 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1847,8 +1847,6 @@ static void rbd_osd_req_callback(struct ceph_osd_request *osd_req,
if (osd_req->r_result < 0)
obj_request->result = osd_req->r_result;
- rbd_assert(osd_req->r_num_ops <= CEPH_OSD_MAX_OP);
-
/*
* We support a 64-bit length, but ultimately it has to be
* passed to the block layer, which just supports a 32-bit