From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-kernel@vger.kernel.org, dmonakhov@openvz.org
Subject: Re: + mm-search_binary_handler-mem-limit-fix.patch added to -mm tree
Date: Mon, 29 Jan 2007 19:18:25 +0100 [thread overview]
Message-ID: <1170094705.17738.11.camel@localhost> (raw)
In-Reply-To: <20070129093751.a1637a68.akpm@osdl.org>
On Mon, 2007-01-29 at 09:37 -0800, Andrew Morton wrote:
> hm, thanks for testing - I'll drop it.
>
> I don't really understand what's wrong with it though. Maybe it's settng
> USER_DS on kernel threads?
For architectures with a split address space there has to be a call
set_fs(USER_DS) that switches from KERNEL_DS to USER_DS for the init
process. So far this has been done in search_binary_handler and
traditionally the kernel starts with KERNEL_DS to make the early
copy_from_user calls work.
So, what is wrong with always setting USER_DS? We are starting a user
space process after all.
--
blue skies,
Martin.
Martin Schwidefsky
Linux for zSeries Development & Services
IBM Deutschland Entwicklung GmbH
"Reality continues to ruin my life." - Calvin.
next prev parent reply other threads:[~2007-01-29 18:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-24 9:09 + mm-search_binary_handler-mem-limit-fix.patch added to -mm tree akpm
2007-01-29 11:33 ` Heiko Carstens
2007-01-29 13:59 ` Heiko Carstens
2007-01-29 17:37 ` Andrew Morton
2007-01-29 18:18 ` Martin Schwidefsky [this message]
2007-01-30 5:40 ` Dmitriy Monakhov
2007-01-30 12:23 ` Martin Schwidefsky
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