redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

as-iosched: fix write batch start point 

New write batches currently start from where the last one completed.
We have no idea where the head is after switching batches, so this
makes little sense.  Instead, start the next batch from the request
with the earliest deadline in the hope that we avoid a deadline
expiry later on.

Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
hifive-unleashed-5.1
Aaron Carroll 2007-12-05 21:07:07 +11:00 committed by Jens Axboe
parent 8896f3c039
commit 49565124b1
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
block/as-iosched.c
View File

@ -1097,7 +1097,8 @@ dispatch_writes:
ad->batch_data_dir = REQ_ASYNC;
ad->current_write_count = ad->write_batch_count;
ad->write_batch_idled = 0;
rq = ad->next_rq[ad->batch_data_dir];
rq = rq_entry_fifo(ad->fifo_list[REQ_ASYNC].next);
ad->last_check_fifo[REQ_ASYNC] = jiffies;
goto dispatch_request;
}