[linuxsh-dev] Re: memcpy/TLBMiss patch assembled for 2.4.18cvs

[Masahiro A. <m-...@aa...>]

I'm sorry but my test had a mistake...

Announced patch doesn't work on my SolutionEngine 7750S.
"Unable to handle kernel paging request" occurs inside remap_area_pte.
It's called as
start_kernel
  |-->mem_init
        |-->p3_cache_init
              |-->remap_area_pages
                    |-->remap_area_pmd
                          |-->remap_area_pte
Will do some more investigation...

On Sun, 26 Jan 2003 19:06:18 +0900
Masahiro Abe <m-...@aa...> wrote:

> I'm trying Mr. Stuart Menefy's "memcpy speed-up" and "TLB Miss Handling
> optimization" patch with 2.4.18cvs source, on SolutionEngine 7750S, in
> the hope that they may improve the behavior of RTLinux-patched kernel.
> 
> Now it's build and seems to work without problems. I don't have
> performance figure yet, but thought some of you might try his work with
> relatively easier way, I've put simple patch files on our server.
> 
> <ftp://ftp.aandd.co.jp/pub/linuxsh/work/20030126/>
> 
> There are three patches there.
> -diff-2.4.18-cvs.diff.bz2 is to apply changes to stock 2.4.18 kernel,
> and make it same as the "linux-2_4_18" tagged cvs source.
> -diff-2.4.18cvs-se.diff.bz2 is to apply to the "linux-2_4_18" tagged cvs
> source, and make it boot from CompactFlash on SolutionEngine 7750S. This
> is not needed for other platforms.
> -diff-2.4.18se-su-20030126-1.diff.bz2 is the main patch file of today.
> This is to apply to the "linux-2_4_18" tagged cvs source. Includes "memcpy
> speed-up" and "TLB Miss Handling optimization" patch.
> 
> I've read Mr. Stuart Menefy's original posts carefully and tried to
> apply his changes as intended, but there may be some error due to my
> lack of understanding. If such is found, please let everybody know.
> 
> to Mr. Stuart Menefy:
> Regarding TLBMiss patch, I've moved "PCC_MASK" to asm-sh/mmu_context.h
> and use in kernel/entry.S and mm/fault.c, since I thought the change in
> update_mmu_cache is related to this flag. Please let me know if this
> assumption is correct. Thanks.
> 
> =================================
> Masahiro ABE, A&D Co., Ltd. Japan
> 

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Masahiro ABE, A&D Co., Ltd. Japan