From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 510ACC282DD for ; Thu, 23 May 2019 16:30:00 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 24E1320879 for ; Thu, 23 May 2019 16:30:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="jWnkd4lC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 24E1320879 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ACULAB.COM Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To:References: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2woHD79kvnEmc6aVIzx7uwXgNHy2hFj17sULTIAq50g=; b=jWnkd4lCtMsj4B mKT3SjqYzQ2LFy+qaNdIKwzk+p0U0Z64eA+f3X60Zt2cEz63iZLZAn4gJ/9jIwQquVsC9lQRiRwvE 5kdliPmFbSsZDUulDTNHtO131TD7ONIavsJsECuO+cmIe2s2wZOKmH7MlX/lguQx38xKKXvrbfMDX AT0hRmHXoOn92n1vp0whfvkDTW7oMHqMQwr2eyweZyjPnOI9vSnCTE0nq85DKcSFmsMuiL0MuqMYq ff/4dd7qiwNyJHLdLFjEqgQ+2MI6xRBLcFEX5ZLcqyBoigPN1YISpfvmsklLlt+oUZHIftTp3TVKT CdTKTZXfBl7v9QYgNWqQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hTqbN-0000DI-R8; Thu, 23 May 2019 16:29:57 +0000 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hTqbK-0000BY-IX for linux-arm-kernel@lists.infradead.org; Thu, 23 May 2019 16:29:56 +0000 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-124-k_tmI2M6OK6o6fWSJ4SZFw-1; Thu, 23 May 2019 17:29:45 +0100 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 23 May 2019 17:29:44 +0100 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Thu, 23 May 2019 17:29:44 +0100 From: David Laight To: 'Konstantin Khlebnikov' , Christian Brauner , "viro@zeniv.linux.org.uk" , "linux-kernel@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-api@vger.kernel.org" , "torvalds@linux-foundation.org" , "fweimer@redhat.com" Subject: RE: [PATCH v1 1/2] open: add close_range() Thread-Topic: [PATCH v1 1/2] open: add close_range() Thread-Index: AQHVEYO6ZYKDwRYmH0ewnJkZ6B6UzqZ45dMA Date: Thu, 23 May 2019 16:29:44 +0000 Message-ID: <5e57c26cb7044b69acd3846ac474b5d5@AcuMS.aculab.com> References: <20190522155259.11174-1-christian@brauner.io> <67e4458a-9cc4-d1aa-608c-73ebe9e2f7a3@yandex-team.ru> In-Reply-To: <67e4458a-9cc4-d1aa-608c-73ebe9e2f7a3@yandex-team.ru> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-MC-Unique: k_tmI2M6OK6o6fWSJ4SZFw-1 X-Mimecast-Spam-Score: 0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190523_092954_886414_3AD6647D X-CRM114-Status: UNSURE ( 9.39 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "linux-ia64@vger.kernel.org" , "linux-sh@vger.kernel.org" , "ldv@altlinux.org" , "dhowells@redhat.com" , "linux-kselftest@vger.kernel.org" , "sparclinux@vger.kernel.org" , "shuah@kernel.org" , "linux-arch@vger.kernel.org" , "linux-s390@vger.kernel.org" , "miklos@szeredi.hu" , "x86@kernel.org" , "linux-mips@vger.kernel.org" , "linux-xtensa@linux-xtensa.org" , "tkjos@android.com" , "arnd@arndb.de" , "jannh@google.com" , "linux-m68k@lists.linux-m68k.org" , "tglx@linutronix.de" , "linux-arm-kernel@lists.infradead.org" , "linux-parisc@vger.kernel.org" , "oleg@redhat.com" , "linux-alpha@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Konstantin Khlebnikov > Sent: 23 May 2019 17:22 .... > > In addition, the syscall will also work for tasks that do not have procfs > > mounted and on kernels that do not have procfs support compiled in. In such > > situations the only way to make sure that all file descriptors are closed > > is to call close() on each file descriptor up to UINT_MAX or RLIMIT_NOFILE, > > OPEN_MAX trickery (cf. comment [8] on Rust). Code using RLIMIT_NOFILE is broken. It is easy to reduce the hard limit below that of an open fd. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel