lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

block: unify request timeout handling

Browse Source 
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>
This commit is contained in:
Jens Axboe
2008-09-14 05:55:09 -07:00
parent 608aeef17a
commit 242f9dcb8b
39 changed files with 399 additions and 339 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/scsi/sd.c
View File

@@ -383,7 +383,6 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
sector_t block = rq->sector;
sector_t threshold;
unsigned int this_count = rq->nr_sectors;
unsigned int timeout = sdp->timeout;
int ret;
if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
@@ -584,7 +583,6 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq)
SCpnt->transfersize = sdp->sector_size;
SCpnt->underflow = this_count << 9;
SCpnt->allowed = SD_MAX_RETRIES;
SCpnt->timeout_per_command = timeout;
/*
* This indicates that the command is ready from our end to be
@@ -1878,11 +1876,12 @@ static int sd_probe(struct device *dev)
sdkp->openers = 0;
sdkp->previous_state = 1;
if (!sdp->timeout) {
if (!sdp->request_queue->rq_timeout) {
if (sdp->type != TYPE_MOD)
sdp->timeout = SD_TIMEOUT;
blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
else
sdp->timeout = SD_MOD_TIMEOUT;
blk_queue_rq_timeout(sdp->request_queue,
SD_MOD_TIMEOUT);
}
device_initialize(&sdkp->dev);