Does anyone want a CPU_WT_ALLOC_DISABLE and CPU_WT_ALLOC_ENABLE as separate
options? I see a couple changes that should be made to the kernel now:
CPU: AMD-K6(tm) 3D processor (300.69-MHz 586-class CPU)
Origin = "AuthenticAMD" Id = 0x58c Stepping=12
Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX>
There should be another line, formatted the same, that ALWAYS reports
CPU_WT_ALLOC info. This will help in debugging problems with certain hardware,
because on K6-2's I get unreliability with write allocation on. For instance,
I updated my BIOS lately and observed a crash. On boot -v, I noted that
the BIOS was kind enough to turn on write allocation, but on a CPU that it
doesn't seem to work well on.
I propose an option to turn OFF write allocation instead of just one to turn
it on. I also propose the change in CPU info printouts to (more correct spacing
and extra line):
CPU: AMD-K6(tm) 3D processor (300.69-MHz 586-like CPU)
Origin = "AuthenticAMD" Id = 0x58c Stepping = 12
Features = 0x8021bf <FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX>
Write Allocation: Disabled 15-16M Caching Enable: No
The changes would be better spacing, a write allocation line (for whatever
CPUs are supported, notably the K5, K6, K6-[23]), and changing "class" to
the more sensible "like" (i.e. a K6 really is 686-class, but being socket 7
is 586-like).
Comments?
Brian Feldman _ __ ___ ___ ___
gr...@unixhelp.org _ __ ___ | _ ) __| \
http://www.freebsd.org/ _ __ ___ ____ | _ \__ \ |) |
FreeBSD: The Power to Serve! _ __ ___ ____ _____ |___/___/___/
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