Subject: Re: Kernel copyin/out optimizations for ARM...
To: David Laight <firstname.lastname@example.org>
From: Jason R Thorpe <email@example.com>
Date: 03/16/2002 16:47:19
On Sat, Mar 16, 2002 at 09:50:45PM +0000, David Laight wrote:
> ok, todays code - and I'm definititly not playing with it again!
> Copies aligned chunk of each page with ldmia/stmia.
Well, it doesn't work :-)
First of all, I had to futz with the numbered-labels. Our ELF assembler
does like e.g. 11$. I'm pretty sure I got the translation to gas-style
numbered-labels right :-)
Secondly, after managing to fork a few processes on an SA-110, it
panic: kernel diagnostic assertion "umap->refcount != 0" failed: file "/u1/netbsd/src/sys/arch/shark/compile/SHAG-SHARK/../../../../uvm/uvm_bio.c", line 253
Looks like it's not honoring write-protection properly somewhere.
-- Jason R. Thorpe <firstname.lastname@example.org>