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author | Jens Axboe <jens.axboe@oracle.com> | 2008-09-14 05:55:09 -0700 |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:13 +0200 |
commit | 242f9dcb8ba6f68fcd217a119a7648a4f69290e9 (patch) | |
tree | 1bfe245ffbc50d204d76665cd8f90d85100f86a1 /drivers/scsi/libiscsi.c | |
parent | 608aeef17a91747d6303de4df5e2c2e6899a95e8 (diff) | |
download | linux-3.10-242f9dcb8ba6f68fcd217a119a7648a4f69290e9.tar.gz linux-3.10-242f9dcb8ba6f68fcd217a119a7648a4f69290e9.tar.bz2 linux-3.10-242f9dcb8ba6f68fcd217a119a7648a4f69290e9.zip |
block: unify request timeout handling
Right now SCSI and others do their own command timeout handling.
Move those bits to the block layer.
Instead of having a timer per command, we try to be a bit more clever
and simply have one per-queue. This avoids the overhead of having to
tear down and setup a timer for each command, so it will result in a lot
less timer fiddling.
Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
-rw-r--r-- | drivers/scsi/libiscsi.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 299e075a7b3..1eca82420aa 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -1476,12 +1476,12 @@ static void iscsi_start_tx(struct iscsi_conn *conn) scsi_queue_work(conn->session->host, &conn->xmitwork); } -static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) +static enum blk_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) { struct iscsi_cls_session *cls_session; struct iscsi_session *session; struct iscsi_conn *conn; - enum scsi_eh_timer_return rc = EH_NOT_HANDLED; + enum blk_eh_timer_return rc = BLK_EH_NOT_HANDLED; cls_session = starget_to_session(scsi_target(scmd->device)); session = cls_session->dd_data; @@ -1494,14 +1494,14 @@ static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) * We are probably in the middle of iscsi recovery so let * that complete and handle the error. */ - rc = EH_RESET_TIMER; + rc = BLK_EH_RESET_TIMER; goto done; } conn = session->leadconn; if (!conn) { /* In the middle of shuting down */ - rc = EH_RESET_TIMER; + rc = BLK_EH_RESET_TIMER; goto done; } @@ -1513,20 +1513,21 @@ static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd) */ if (time_before_eq(conn->last_recv + (conn->recv_timeout * HZ) + (conn->ping_timeout * HZ), jiffies)) - rc = EH_RESET_TIMER; + rc = BLK_EH_RESET_TIMER; /* * if we are about to check the transport then give the command * more time */ if (time_before_eq(conn->last_recv + (conn->recv_timeout * HZ), jiffies)) - rc = EH_RESET_TIMER; + rc = BLK_EH_RESET_TIMER; /* if in the middle of checking the transport then give us more time */ if (conn->ping_task) - rc = EH_RESET_TIMER; + rc = BLK_EH_RESET_TIMER; done: spin_unlock(&session->lock); - debug_scsi("return %s\n", rc == EH_RESET_TIMER ? "timer reset" : "nh"); + debug_scsi("return %s\n", rc == BLK_EH_RESET_TIMER ? + "timer reset" : "nh"); return rc; } |