Date: Wed, 29 May 2013 11:18:08 +0200
From: Jens Axboe <axboe@kernel.dk>
To: Kent Overstreet <koverstreet@google.com>
Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org,
        linux-kernel@vger.kernel.org, linux-aio@kvack.org,
        Zach Brown <zab@redhat.com>, Felipe Balbi <balbi@ti.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Mark Fasheh <mfasheh@suse.com>, Joel Becker <jlbec@evilplan.org>,
        Rusty Russell <rusty@rustcorp.com.au>,
        Asai Thambi S P <asamymuthupa@micron.com>,
        Selvan Mani <smani@micron.com>, Sam Bradshaw <sbradshaw@micron.com>,
        Jeff Moyer <jmoyer@redhat.com>, Al Viro <viro@zeniv.linux.org.uk>,
        Benjamin LaHaise <bcrl@kvack.org>
Subject: Re: [PATCH] aio: Use call_rcu() instead of synchronize_rcu() in
 kill_ioctx()
Message-ID: <20130529091808.GS22724@kernel.dk>
References: <1369776378-27921-1-git-send-email-koverstreet@google.com>
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On Tue, May 28 2013, Kent Overstreet wrote:
> Just making ioctx shutdown asynchronous so as not to block io_destroy()
> - and percpu refcounts for the ioctx are going to need a RCU barrier in
> the same place anyways.

Works for me, and gets rid of that nasty regression on taking forever to
tear things down. You can add my Tested-by.

-- 
Jens Axboe

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