Re: REGRESSION in 2.6.13-rc1: Massive slowdown with Adaptec SCSI

2005-07-05 Thread Neil Brown
On Tuesday July 5, [EMAIL PROTECTED] wrote: On Tuesday July 5, [EMAIL PROTECTED] wrote: On Tue, Jul 05, 2005 at 11:08:17AM +1000, Neil Brown wrote: On 2.6.13-rc1 the same test takes just short on 1 minute and reports slightly less than 2 M/Second. That sounds like your drives have

Re: REGRESSION in 2.6.13-rc1: Massive slowdown with Adaptec SCSI

2005-07-05 Thread Mail USFLTD
kernel 2.6.13-rc1-git7 after applaying patch transfer back to 72MB/s on aha19160 with 15k rpm seagate with reiserfs3 but possible deadlock in heavy IO - rsync ~5-files from /mnt/seagate15k/a to /mnt/seagate15k/b ended in middle with deadlock of rsync (3 instances), pdflush, and gam_server

Re: REGRESSION in 2.6.13-rc1: Massive slowdown with Adaptec SCSI

2005-07-05 Thread art
kernel 2.6.13-rc1-git7 after applaying patch transfer back to 72MB/s on aha19160 with 15k rpm seagate with reiserfs3 but possible deadlock in heavy IO - rsync ~5-files from /mnt/seagate15k/a to /mnt/seagate15k/b ended in middle with deadlock of rsync (3 instances), pdflush, and gam_server

REGRESSION in 2.6.13-rc1: Massive slowdown with Adaptec SCSI

2005-07-04 Thread Neil Brown
Hi, I have a server with a: SCSI storage controller: Adaptec AHA-3960D / AIC-7899A U160/m (rev 01) Subsystem: Adaptec AHA-3960D U160/m connected to 14 Vendor: MAXTOR Model: ATLAS15K_36SCA Rev: DTA0 7 on each channel. On 2.6.12 a simple 'dd' write test gives 70

Re: REGRESSION in 2.6.13-rc1: Massive slowdown with Adaptec SCSI

2005-07-04 Thread Matthew Wilcox
On Tue, Jul 05, 2005 at 11:08:17AM +1000, Neil Brown wrote: On 2.6.13-rc1 the same test takes just short on 1 minute and reports slightly less than 2 M/Second. That sounds like your drives have negotiated an asynchronous transfer agreement. Could you provide your dmesg to confirm that