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author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2014-05-08 08:08:05 (GMT) |
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committer | Philipp Reisner <philipp.reisner@linbit.com> | 2014-07-10 16:35:14 (GMT) |
commit | c5a2c1509ea55d074bf0cd8ff0679b247f70cbe3 (patch) | |
tree | 66f97073f1dc8a6d72ffea067911e9f1f6e6740e /drivers/block | |
parent | 21ae5d7f95aa1a64f35b03c91f8714ced3ab61a9 (diff) | |
download | linux-c5a2c1509ea55d074bf0cd8ff0679b247f70cbe3.tar.xz |
drbd: register peer requests on read_ee early
Initialize peer_request with timestamp and proper empty list head.
Add peer_request to list early, so debugfs can find this request and
report it as "preparing", even if we sleep before we actually submit it.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block')
-rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 2f67dc0..42e3835 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -362,17 +362,14 @@ drbd_alloc_peer_req(struct drbd_peer_device *peer_device, u64 id, sector_t secto goto fail; } + memset(peer_req, 0, sizeof(*peer_req)); + INIT_LIST_HEAD(&peer_req->w.list); drbd_clear_interval(&peer_req->i); peer_req->i.size = data_size; peer_req->i.sector = sector; - peer_req->i.local = false; - peer_req->i.waiting = false; - - peer_req->epoch = NULL; + peer_req->submit_jif = jiffies; peer_req->peer_device = peer_device; peer_req->pages = page; - atomic_set(&peer_req->pending_bios, 0); - peer_req->flags = 0; /* * The block_id is opaque to the receiver. It is not endianness * converted, and sent back to the sender unchanged. @@ -2668,6 +2665,15 @@ static int receive_DataRequest(struct drbd_connection *connection, struct packet * we would also throttle its application reads. * In that case, throttling is done on the SyncTarget only. */ + + /* Even though this may be a resync request, we do add to "read_ee"; + * "sync_ee" is only used for resync WRITEs. + * Add to list early, so debugfs can find this request + * even if we have to sleep below. */ + spin_lock_irq(&device->resource->req_lock); + list_add_tail(&peer_req->w.list, &device->read_ee); + spin_unlock_irq(&device->resource->req_lock); + if (device->state.peer != R_PRIMARY && drbd_rs_should_slow_down(device, sector, false)) schedule_timeout_uninterruptible(HZ/10); @@ -2679,21 +2685,18 @@ submit_for_resync: submit: inc_unacked(device); - spin_lock_irq(&device->resource->req_lock); - list_add_tail(&peer_req->w.list, &device->read_ee); - spin_unlock_irq(&device->resource->req_lock); - if (drbd_submit_peer_request(device, peer_req, READ, fault_type) == 0) return 0; /* don't care for the reason here */ drbd_err(device, "submit failed, triggering re-connect\n"); + +out_free_e: spin_lock_irq(&device->resource->req_lock); list_del(&peer_req->w.list); spin_unlock_irq(&device->resource->req_lock); /* no drbd_rs_complete_io(), we are dropping the connection anyways */ -out_free_e: put_ldev(device); drbd_free_peer_req(device, peer_req); return -EIO; |