Re: [Linux-ia64] IA64 Linux issues

From: Jes Sorensen <jes_at_sunsite.dk>
Date: 2001-07-31 08:12:07
>>>>> "Van" == Van Maren, Kevin <kevin.vanmaren@unisys.com> writes:

Van> I'm running Caldera's 6/20/01 snapshot (modified 2.4.4 kernel) on
Van> a 4X, 8GB Lion.

Van> Under even "light" I/O load (mkfs to 2-4 disks) I get horiffic
Van> behavior -- basically what is described on this thread:
Van> http://www.cs.helsinki.fi/linux/linux-kernel/2001-20/0763.html
Van> [I/O drops down to < 300 I/Os per second (vmstat), but all the
Van> CPUs are pegged 99%+ system time.]

Van> That is after I first used "swiotlb=10240" at elilo to avoid the
Van> panic, and then hacked the qlogicfc driver (patch at bottom) and
Van> applied the latest Adaptec driver patch (6.2.0) from freebsd.org
Van> to get 39-bit DMA.  Problem occurs with 39160 & QL2200.

I'd stay away from the qlogicfc.c driver, it's got all sorts of
limitations.

Jes
Received on Mon Jul 30 15:12:20 2001

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