From: Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCH 13/18] exec: make exec path waiting for mmap_sem killable
Date: Fri, 11 Mar 2016 13:51:13 +0100
Message-ID: <56E2BF41.1000808@suse.cz>
References: <1456752417-9626-1-git-send-email-mhocko@kernel.org>
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To: Michal Hocko <mhocko@kernel.org>, LKML <linux-kernel@vger.kernel.org>
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On 02/29/2016 02:26 PM, Michal Hocko wrote:
> From: Michal Hocko <mhocko@suse.com>
>
> setup_arg_pages requires mmap_sem for write. If the waiting task
> gets killed by the oom killer it would block oom_reaper from
> asynchronous address space reclaim and reduce the chances of timely
> OOM resolving. Wait for the lock in the killable mode and return with
> EINTR if the task got killed while waiting. All the callers are already
> handling error path and the fatal signal doesn't need any additional
> treatment.
>
> The same applies to __bprm_mm_init.
>
> Cc: Alexander Viro <viro@zeniv.linux.org.uk>
> Signed-off-by: Michal Hocko <mhocko@suse.com>


Acked-by: Vlastimil Babka <vbabka@suse.cz>

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