From: Roland Dreier <roland@topspin.com>
To: "Michael S. Tsirkin" <mst@mellanox.co.il>
Cc: linux-kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: f_ops flag to speed up compatible ioctls in linux kernel
Date: Wed, 01 Sep 2004 14:44:01 -0700 [thread overview]
Message-ID: <52656xzmu6.fsf@topspin.com> (raw)
In-Reply-To: <20040901212314.GA26044@mellanox.co.il> (Michael S. Tsirkin's message of "Thu, 2 Sep 2004 00:23:15 +0300")
Michael> Now that I look at the ioctl.c code, I see a several
Michael> get_user/put_user inside the ioctl which are thus done
Michael> while BKL is held. But I thought get_user can block?
Michael> Why is this not a bug?
It's fine to sleep while holding the BKL (it will be dropped and then
reacquired when the process wakes up).
- Roland
next prev parent reply other threads:[~2004-09-01 21:49 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-01 15:40 f_ops flag to speed up compatible ioctls in linux kernel Albert Cahalan
2004-09-01 21:23 ` Michael S. Tsirkin
2004-09-01 21:38 ` Lee Revell
2004-09-01 21:43 ` Chris Wright
2004-09-01 21:44 ` Roland Dreier [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-12-27 22:22 Michael S. Tsirkin
2004-09-01 15:36 Albert Cahalan
2004-09-01 15:59 ` Roland Dreier
2004-09-01 21:53 ` Michael S. Tsirkin
2004-09-01 22:58 ` Roland Dreier
2004-09-01 23:18 ` Michael S. Tsirkin
2004-09-01 9:50 filia
2004-09-01 9:52 ` Arjan van de Ven
2004-09-01 10:16 ` filia
[not found] ` <4135B9FC.7050602@hist.no>
2004-09-01 13:29 ` Ihar 'Philips' Filipau
2004-09-01 15:28 ` Ihar 'Philips' Filipau
2004-09-02 7:29 ` Helge Hafting
2004-09-01 13:43 ` Olivier Galibert
2004-09-01 7:22 Michael S. Tsirkin
2004-09-01 7:32 ` viro
2004-09-01 7:44 ` Michael S. Tsirkin
2004-09-01 7:47 ` Lee Revell
2004-09-01 8:19 ` Michael S. Tsirkin
2004-09-01 15:55 ` Roland Dreier
2004-09-01 18:02 ` Chris Wright
2004-09-01 18:12 ` Roland Dreier
2004-09-01 18:31 ` viro
2004-09-01 20:54 ` Roland Dreier
[not found] ` <20040901170800.K1924@build.pdx.osdl.net>
[not found] ` <20040901190122.L1924@build.pdx.osdl.net>
2004-09-02 3:46 ` Roland Dreier
2004-09-01 18:06 ` Bill Davidsen
2004-09-01 8:30 ` Arjan van de Ven
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