linux-kernel - Re: [PATCH] uprobes: Teach copy

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Message-ID: <20140521085421.GB29630@linux.vnet.ibm.com>
Date:	Wed, 21 May 2014 14:24:21 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Denys Vlasenko <dvlasenk@...hat.com>,
	Hugh Dickins <hughd@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] uprobes: Teach copy_insn() to support tmpfs

* Oleg Nesterov <oleg@...hat.com> [2014-05-19 20:41:36]:

> tmpfs is widely used but as Denys reports shmem_aops doesn't have
> ->readpage() and thus you can't probe a binary on this filesystem.
> 
> As Hugh suggested we can use shmem_read_mapping_page() in this case,
> just we need to check shmem_mapping() if ->readpage == NULL.
> 
> Reported-by: Denys Vlasenko <dvlasenk@...hat.com>
> Suggested-by: Hugh Dickins <hughd@...gle.com>
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Acked-by: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>

-- 
Thanks and Regards
Srikar Dronamraju

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