Re: Badness in as_completed_request

From: Nick Piggin
Date: Wed Nov 05 2003 - 04:19:54 EST

Aaron Lehmann wrote:

I've been seeing this about every day for the past month or so, while
tracking 2.6.0-test*. Usually by the time I feel like reporting it I'm
a few revisions behind and decide to upgrade before complaining about
it. Now I'm running -test9 and it still happens. This happens every
few day or so under normal load and every few minutes under high I/O
load. I'm running an x86 system with a 3ware RAID5:

Badness in as_completed_request at drivers/block/as-iosched.c:919

This warning is harmless. Here is a patch against 2.6.0-test9-mm2.
Please test that kernel as it has a few other important as-iosched
fixes. Thanks.

linux-2.6-npiggin/drivers/block/as-iosched.c | 2 --
1 files changed, 2 deletions(-)

diff -puN drivers/block/as-iosched.c~as-warn-fix drivers/block/as-iosched.c
--- linux-2.6/drivers/block/as-iosched.c~as-warn-fix 2003-11-05 20:16:42.000000000 +1100
+++ linux-2.6-npiggin/drivers/block/as-iosched.c 2003-11-05 20:16:58.000000000 +1100
@@ -965,8 +965,6 @@ static void as_completed_request(request

if (ad->changed_batch && ad->nr_dispatched == 1) {
- WARN_ON(ad->batch_data_dir == arq->is_sync);
ad->changed_batch = 0;