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Message-ID: <46EA4730.2070806@gmail.com>
Date:	Fri, 14 Sep 2007 10:32:48 +0200
From:	Franck Bui-Huu <vagabon.xyz@gmail.com>
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To:	Atsushi Nemoto <anemo@mba.ocn.ne.jp>
CC:	linux-mips@linux-mips.org
Subject: Re: flush_kernel_dcache_page() not needed ?
References: <46DC29F0.3060200@gmail.com>	<20070904.005400.52128244.anemo@mba.ocn.ne.jp>	<46DD53BE.2070004@gmail.com> <20070906.003320.25909195.anemo@mba.ocn.ne.jp>
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Atsushi Nemoto wrote:
> Yes, there is an yet another path to "flush all dcache".
> 
> do_execve()
>   copy_strings()
>     flush_kernel_dcache_page()
>   search_binary_handler()
>     load_elf_binary()
>       flush_old_exec()
>         exec_mmap()
>           mmput()
>             exit_mmap()
>               flush_cache_mm()
>                 r4k_blast_dcache()
> 

BTW, flush_cache_mm() flushes (write back + invalidate ) the whole
data cache unconditionnaly, but I'm wondering if it's really necessary
for cpus which don't have any cache aliasing issues. After all they're
equivalent to physical caches, aren't they ?

thanks,
		Franck