From: Al Viro <viro@ZenIV.linux.org.uk>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Xiaotian Feng <xtfeng@gmail.com>,
akpm@linux-foundation.org, Xiaotian Feng <dannyfeng@tencent.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] proc: fix inconsistent lock state
Date: Wed, 19 Dec 2012 16:44:08 +0000 [thread overview]
Message-ID: <20121219164408.GK4939@ZenIV.linux.org.uk> (raw)
In-Reply-To: <dfadce3a-07b9-4760-9213-edf93abab2e7@email.android.com>
On Wed, Dec 19, 2012 at 04:13:30AM -0800, Eric W. Biederman wrote:
> Something doesn't feel right. I don't think there should be a path where we get to proc_free_inum from bh context.
>
> Rcu callbacks should be running in process context (if a special one).
No, they are not. They run from softirq context, which makes for all kinds
of interesting kludges being required in various places.
prev parent reply other threads:[~2012-12-19 16:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-19 10:26 [PATCH] proc: fix inconsistent lock state Xiaotian Feng
2012-12-19 12:13 ` Eric W. Biederman
2012-12-19 16:44 ` Al Viro [this message]
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