Hello,
I've stumbled onto a strange performance problem on a new server:
reading from disks is fast (70-80MB/s), but writing is extremely
slow (13-15MB/s). I've measured it like this:
dd if=/dev/zero of=/dev/sdd bs=4096 count=65536 conv=fdatasync
65536+0 records in
65536+0 records out
On Mon, 2007-02-05 at 16:38 -0800, [EMAIL PROTECTED] wrote:
From: OGAWA Hirofumi [EMAIL PROTECTED]
I got the oops after some hotplug events. And the similar oops can
reproduce by the following step.
James Smart already pointed out that this fix isn't valid ... it's a
bandaid that doesn't fix
Hi James,
We are investigating this issue here. We will update the status when
we can duplicate the problem here and root cause.
Thanks!
Gilbert
-Original Message-
From: James Bottomley [mailto:[EMAIL PROTECTED]
Sent: Saturday, February 03, 2007 2:29 PM
To: Wu, Gilbert
Cc:
On Tue, 06 Feb 2007 09:22:06 -0600
James Bottomley [EMAIL PROTECTED] wrote:
On Mon, 2007-02-05 at 16:38 -0800, [EMAIL PROTECTED] wrote:
From: OGAWA Hirofumi [EMAIL PROTECTED]
I got the oops after some hotplug events. And the similar oops can
reproduce by the following step.
James
Hannes and I will be fostering discussion at the upcoming IO summit
to discuss options.
-- james s
Andrew Morton wrote:
On Tue, 06 Feb 2007 09:22:06 -0600
James Bottomley [EMAIL PROTECTED] wrote:
On Mon, 2007-02-05 at 16:38 -0800, [EMAIL PROTECTED] wrote:
From: OGAWA Hirofumi [EMAIL
On Tue, 6 Feb 2007 09:54:59 -0800
[EMAIL PROTECTED] wrote:
http://bugzilla.kernel.org/show_bug.cgi?id=7951
Summary: ESP DMA error
Kernel Version: 2.6.20
Status: NEW
Severity: normal
Owner: [EMAIL PROTECTED]
Submitter: [EMAIL
From: Andrew Morton [EMAIL PROTECTED]
Date: Tue, 6 Feb 2007 13:29:17 -0800
Apparently a recent regression.
It's on sparc32 (and SMP on top of that, scary) which is only lightly
maintained, so it could be anything. It would be interesting if
running a uniprocessor kernel made the problem go
Bernardo Innocenti wrote:
Hello,
I've stumbled onto a strange performance problem on a new server:
reading from disks is fast (70-80MB/s), but writing is extremely
slow (13-15MB/s). I've measured it like this:
dd if=/dev/zero of=/dev/sdd bs=4096 count=65536 conv=fdatasync
65536+0
On Mon, Jan 29, 2007 at 08:45:28PM -0800, Andrew Morton wrote:
...
Changes since 2.6.20-rc6-mm2:
...
git-scsi-misc.patch
...
git trees
...
This patch contains the following cleanups:
- proper prototypes for global code in aacraid.h
- aac_rx_start_adapter() can now become static
Checks if hw_crit_error is set before processing cmds.
Added in megasas_queue_command and command completion routines.
Signed-off-by: Sumant Patro [EMAIL PROTECTED]
---
drivers/scsi/megaraid/megaraid_sas.c | 13 -
1 files changed, 12 insertions(+), 1 deletion(-)
diff -uprN
Added bios_param in scsi_host_template to return disk geometry.
Signed-off-by: Sumant Patro [EMAIL PROTECTED]
---
drivers/scsi/megaraid/megaraid_sas.c | 45 +
1 files changed, 45 insertions(+)
diff -uprN 2.6.new-p1/drivers/scsi/megaraid/megaraid_sas.c
Checks added in megasas_queue_command to know if FW is able to process
commands within timeout period. If number of retries is 2 or greater,
the driver stops sending cmd to FW. IO is resumed if pending cmd count
reduces to 16 or 5 seconds has elapsed from the time cmds were last sent
to FW.
Preallocate memory for ioctl processing. This is to avoid situations
where ioctl fails for lack of memory (when system under heavy stress).
The memory pool will have 8*4K, 4*8K and 1*64K memory chunks
Signed-off-by: Sumant Patro [EMAIL PROTECTED]
drivers/scsi/megaraid/megaraid_sas.c | 257
Update version and author information.
Signed-off-by: Sumant Patro [EMAIL PROTECTED]
---
drivers/scsi/megaraid/megaraid_sas.c |8 +---
drivers/scsi/megaraid/megaraid_sas.h |6 +++---
2 files changed, 8 insertions(+), 6 deletions(-)
diff -uprN
Hi LSI MegaRAID/Linux team,
There's a LSI 1068 chip that can be found on NEC hardware (also
Intel/Supermicro/Hitachi, ...) and that can provide RAID 0 and 1 based
on a MegaRAID BIOS.
By setting a jumper, LSI1068 chip can be used in 2 modes:
- LSI1068 'MPT-Fusion':
pciid 1000:0054
embedded
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