diff options
| author | Mark Haverkamp <markh@osdl.org> | 2005-08-01 21:11:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-08-01 21:37:59 -0700 |
| commit | 43f2f3d343f9d00a94a9242547a59d9dfb2338c4 (patch) | |
| tree | e3a4b278a060bb26a8edfc1bb7e239c01b90d829 /drivers | |
| parent | 2757a71c3122c7653e3dd8077ad6ca71efb1d450 (diff) | |
[PATCH] aacraid: Fix for controller load based timeouts
Martin Drab found that he could get aacraid timeouts with high load on his
controller / disk drive combinations. After some experimentation Mark
Salyzyn has come up with a patch to reduce the default max_sectors to
something that will keep the controller from being overloaded and will
eliminate the timeout issues.
Signed-off-by: Mark Haverkamp <markh@osdl.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Acked-by: Mark Salyzyn <mark_salyzyn@adaptec.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/aacraid/aacraid.h | 6 | ||||
| -rw-r--r-- | drivers/scsi/aacraid/linit.c | 3 |
2 files changed, 3 insertions, 6 deletions
diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h index 3a11a536c0da..4ab07861b457 100644 --- a/drivers/scsi/aacraid/aacraid.h +++ b/drivers/scsi/aacraid/aacraid.h @@ -15,11 +15,7 @@ #define AAC_MAX_LUN (8) #define AAC_MAX_HOSTPHYSMEMPAGES (0xfffff) -/* - * max_sectors is an unsigned short, otherwise limit is 0x100000000 / 512 - * Linux has starvation problems if we permit larger than 4MB I/O ... - */ -#define AAC_MAX_32BIT_SGBCOUNT ((unsigned short)8192) +#define AAC_MAX_32BIT_SGBCOUNT ((unsigned short)512) /* * These macros convert from physical channels to virtual channels diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c index c1a4f978fcba..562da90480a1 100644 --- a/drivers/scsi/aacraid/linit.c +++ b/drivers/scsi/aacraid/linit.c @@ -374,7 +374,8 @@ static int aac_slave_configure(struct scsi_device *sdev) else scsi_adjust_queue_depth(sdev, 0, 1); - if (host->max_sectors < AAC_MAX_32BIT_SGBCOUNT) + if (!(((struct aac_dev *)host->hostdata)->adapter_info.options + & AAC_OPT_NEW_COMM)) blk_queue_max_segment_size(sdev->request_queue, 65536); return 0; |