Stupid <piggin@cyberone.com.au>
The effect is that it enables a major part of the SCSI TCQ stuff. It seems
to clamp down the batches a lot more. An effect is that devices like IDE,
with small request sizes get even less async writes though, so it will be
important
drivers/block/as-iosched.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff -puN drivers/block/as-iosched.c~as-stupid drivers/block/as-iosched.c
--- 25/drivers/block/as-iosched.c~as-stupid 2003-06-04 19:36:33.000000000 -0700
+++ 25-akpm/drivers/block/as-iosched.c 2003-06-04 19:36:33.000000000 -0700
@@ -1214,9 +1214,9 @@ static int as_dispatch_request(struct as
dispatch_writes:
BUG_ON(RB_EMPTY(&ad->sort_list[REQ_ASYNC]));
- ad->batch_data_dir = REQ_ASYNC;
if (ad->batch_data_dir == REQ_SYNC)
ad->changed_batch = 1;
+ ad->batch_data_dir = REQ_ASYNC;
ad->current_batch_expires = ad->batch_expire[REQ_ASYNC];
arq = ad->next_arq[ad->batch_data_dir];
goto dispatch_request;
@@ -1239,7 +1239,7 @@ fifo_expired:
if (ad->changed_batch) {
if (ad->changed_batch == 1 && ad->nr_dispatched)
return 0;
- if (ad->changed_batch == 2 && ad->batch_data_dir == REQ_ASYNC)
+ if (ad->changed_batch == 1 && ad->batch_data_dir == REQ_ASYNC)
ad->changed_batch = 0;
else
ad->changed_batch = 2;
_