From: Franck Bui-Huu <vagabon.xyz@gmail.com>
To: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: linux-mips@linux-mips.org
Subject: Re: flush_kernel_dcache_page() not needed ?
Date: Tue, 04 Sep 2007 16:05:10 +0200 [thread overview]
Message-ID: <46DD6616.6030303@gmail.com> (raw)
In-Reply-To: <20070904.225402.106261140.anemo@mba.ocn.ne.jp>
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
next prev parent reply other threads:[~2007-09-04 14:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-31 12:25 flush_kernel_dcache_page() not needed ? Franck Bui-Huu
2007-08-31 14:50 ` Markus Gothe
2007-08-31 15:04 ` Franck Bui-Huu
2007-08-31 23:42 ` Ralf Baechle
2007-09-02 21:12 ` Markus Gothe
2007-08-31 14:54 ` Markus Gothe
2007-09-03 13:52 ` Atsushi Nemoto
2007-09-03 15:36 ` Franck Bui-Huu
2007-09-03 15:54 ` Atsushi Nemoto
2007-09-04 12:46 ` Franck Bui-Huu
2007-09-04 13:54 ` Atsushi Nemoto
2007-09-04 14:05 ` Franck Bui-Huu [this message]
2007-09-04 14:16 ` Atsushi Nemoto
2007-09-04 14:17 ` Franck Bui-Huu
2007-09-05 15:33 ` Atsushi Nemoto
2007-09-07 9:00 ` Franck Bui-Huu
2007-09-14 8:32 ` Franck Bui-Huu
2007-09-14 14:29 ` Atsushi Nemoto
2007-09-14 15:47 ` Franck Bui-Huu
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