On Tue, 12 Jul 2005 14:13:01 +0200, "Lars Roland" <[email protected]> said: > You have irq balancing, the line > > CONFIG_IRQBALANCE=y > > in your config file confirms it - I am not completely sure that it is > the root of the problem but when I experienced the problem I changed > two things: my acpi code and irq balancing and one of then made the > difference, I am just to lazy to check which one it is (also it is > production servers so I cannot do whatever I want). Our ACPI looked very similar to yours, so I've disabled IRQBALANCE. We'll be rebooting the server during a less busy time to try the new kernel, so not for about 12 hours or so. > > append="elevator=deadline" > > I use the same io scheduler so that should not be a problem. I have > uploaded my config file - it works on ibm 335/336 servers, and a quick > look at your boot msg seams to indicate that your server have some of > the same hardware - note however that I load ide/scsi/filesystem stuff > as modules so you will need to build a initrd to use my config. > > the config is here > > http://randompage.org/static/kernel.conf Great, thanks for that. I've had a look through and I think the IRQBALANCE issue is the most likely cause. We're also applying the attached patch. There's a bug in reiserfs that gets tickled by our huge MMAP usage (it's amazing what really busy Cyrus daemons can do to a server, ouch). It's fixed in generic_write, so we take the few percent performance hit for something that doesn't break! Bron. -- Bron Gondwana [email protected]
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