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b=D0TFV20SMf+eCOlXjdnnASI0eVTPpeHSXbq/mFjN82ui1HVC3YVsuW8IGzCZqUa+iy/hAp 2mXu5q8Ti0QgyHweL40kQU3aiifNBeiMlMLWlE2RLeKi90W88YwjEiTcZHuarUVS5WJnSP UyjXxZK4RsrgB3wJ2Rk7XIBGlhdVAb4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-594-ARyo9KBvOw-DHqiZaF1ENw-1; Thu, 29 Oct 2020 12:47:57 -0400 X-MC-Unique: ARyo9KBvOw-DHqiZaF1ENw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 451A6807321; Thu, 29 Oct 2020 16:47:56 +0000 (UTC) Received: from localhost (ovpn-113-77.ams2.redhat.com [10.36.113.77]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B96B56EF68; Thu, 29 Oct 2020 16:47:55 +0000 (UTC) From: Giuseppe Scrivano To: Christian Brauner Subject: Re: [PATCH v2 0/2] fs, close_range: add flag CLOSE_RANGE_CLOEXEC References: <20201019102654.16642-1-gscrivan@redhat.com> <20201029153859.numo2fc42vgf3ppk@wittgenstein> Date: Thu, 29 Oct 2020 17:47:53 +0100 In-Reply-To: <20201029153859.numo2fc42vgf3ppk@wittgenstein> (Christian Brauner's message of "Thu, 29 Oct 2020 16:38:59 +0100") Message-ID: <87mu05vv0m.fsf@redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Cc: linux-fsdevel@vger.kernel.org, containers@lists.linux-foundation.org, linux@rasmusvillemoes.dk, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk X-BeenThere: containers@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux Containers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: containers-bounces@lists.linux-foundation.org Sender: "Containers" Hi Christian, Christian Brauner writes: > On Mon, Oct 19, 2020 at 12:26:52PM +0200, Giuseppe Scrivano wrote: >> When the new flag is used, close_range will set the close-on-exec bit >> for the file descriptors instead of close()-ing them. >> >> It is useful for e.g. container runtimes that want to minimize the >> number of syscalls used after a seccomp profile is installed but want >> to keep some fds open until the container process is executed. >> >> v1->v2: >> * move close_range(..., CLOSE_RANGE_CLOEXEC) implementation to a separate function. >> * use bitmap_set() to set the close-on-exec bits in the bitmap. >> * add test with rlimit(RLIMIT_NOFILE) in place. >> * use "cur_max" that is already used by close_range(..., 0). > > I'm picking this up for some testing, thanks > Christian thanks! I've addressed the comments you had for v2 and pushed them here[1] but I've not sent yet v3 as I was waiting for a feedback from Al whether using bitmap_set() is fine. Regards, Giuseppe [1] https://github.com/giuseppe/linux/tree/close-range-cloexec _______________________________________________ Containers mailing list Containers@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/containers