Messages in this thread | | | Date | Wed, 18 Feb 2004 12:20:53 +0100 | From | martin f krafft <> | Subject | the crux with DMA |
| |
Hi folks,
I have two machines with 7200 UPM ATA drives. Both are running the 2.6.2 kernel. One has an AMD-768 IDE chipset and reiserfs, the other a combination of VT82C586 and Promise 20269 with ext3.
Both machines seem to have a problem with DMA, which wasn't a problem with the 2.4 kernel series. The symptoms are simple: if I have DMA turned on, sustained high disk usage will cause complete freezes in both machines. Sometimes, one gets a couple of kernel oops before the eventual lockup, which is usually related to journaling code, but it's never really the same. With a 2.4 kernel, these lockups did not happen. With DMA turned off, I have also not been able to reproduce the crashes.
I know that neither, reiserfs nor ext3, are high-performance, and a switch to xfs has long been on my TODO list, but I first want to get this problem worked out -- I can't mirror the disk otherwise without crashing 40 times, so I can't create new filesystems.
Any advice is appreciated!
-- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! "science without religion is lame, religion without science is blind." -- albert einstein [unhandled content-type:application/pgp-signature] | |