| To: | Atsushi Nemoto <anemo@mba.ocn.ne.jp> |
|---|---|
| Subject: | Re: flush_kernel_dcache_page() not needed ? |
| From: | Franck Bui-Huu <vagabon.xyz@gmail.com> |
| Date: | Tue, 04 Sep 2007 16:05:10 +0200 |
| Cc: | linux-mips@linux-mips.org |
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Atsushi Nemoto wrote:
> On Tue, 04 Sep 2007 14:46:54 +0200, Franck Bui-Huu <vagabon.xyz@gmail.com>
> wrote:
>>> I'll look at it further, but any testcase are welcome.
>
> I found the reason.
>
> do_execve()
> copy_strings()
> flush_kernel_dcache_page()
> search_binary_handler()
> load_elf_binary()
> setup_arg_pages()
> shift_arg_pages()
> move_page_tables()
> flush_cache_range()
>
> And MIPS flush_cache_range() blasts whole dcache! That's why empty
> flush_kernel_dcache_page() was enough for now.
Yeah, that what I think too and that's also why I was suggesting to
test a plain 2.6.23-rc5 with the randomize_va_space=0. Please see my
previous reply...
Could you give it a try ?
Franck
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