From: Roland McGrath <roland@redhat.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org, torvalds@linux-foundation.org
Subject: Re: BKL use in ptrace
Date: Mon, 21 Dec 2009 17:13:29 -0800 (PST) [thread overview]
Message-ID: <20091222011329.D78C010274@magilla.sf.frob.com> (raw)
In-Reply-To: Oleg Nesterov's message of Monday, 21 December 2009 18:02:37 +0100 <20091221170237.GA5384@redhat.com>
> I never understood this lock_kernel().
>
> In any case it looks outdated. We were going to kill it "soon",
> along with other ptrace changes.
I never understood it either. It's very ancient and long predates many,
many ptrace cleanups. If the comment was ever accurate, then any issue
like that is now covered by cred_guard_mutex. I don't know of any reason
for (or really, effect of) using BKL in ptrace.
Thanks,
Roland
prev parent reply other threads:[~2009-12-22 1:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-20 18:53 Andi Kleen
2009-12-21 17:02 ` Oleg Nesterov
2009-12-22 1:13 ` Roland McGrath [this message]
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