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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2977C43334 for ; Fri, 15 Jul 2022 15:45:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229603AbiGOPpG (ORCPT ); Fri, 15 Jul 2022 11:45:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45754 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235771AbiGOPos (ORCPT ); Fri, 15 Jul 2022 11:44:48 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 33A803B3; Fri, 15 Jul 2022 08:44:47 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id E15F220247; Fri, 15 Jul 2022 15:44:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1657899885; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=nL34y1qYFraBx68T2BEQkpXsOQD15F7byblMz6APRsw=; b=tiAdnkdx/G9tsjwcOjDwBrX4tMh3u0Gj4OHzRtHLpRlZyHejpi/CsTEogQxckjnc0NKPOv YT/zJtIRKJ7s1KVtQhaeWIeVhxeex6ZDTn8WfKgAE6e5Uh6lhUkiatGsSmScWNn6/l5zU9 DmllE/Be5BVGWwjxh86l2r8JWfNQ9/M= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id B937C13AC3; Fri, 15 Jul 2022 15:44:45 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id iloYLG2L0WJHYQAAMHmgww (envelope-from ); Fri, 15 Jul 2022 15:44:45 +0000 Date: Fri, 15 Jul 2022 17:44:44 +0200 From: Michal =?iso-8859-1?Q?Koutn=FD?= To: Usama Arif Cc: io-uring@vger.kernel.org, axboe@kernel.dk, asml.silence@gmail.com, linux-kernel@vger.kernel.org, fam.zheng@bytedance.com Subject: Re: [PATCH v6 5/5] io_uring: remove ring quiesce for io_uring_register Message-ID: <20220715154444.GA17123@blackbody.suse.cz> References: <20220204145117.1186568-1-usama.arif@bytedance.com> <20220204145117.1186568-6-usama.arif@bytedance.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220204145117.1186568-6-usama.arif@bytedance.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello. On Fri, Feb 04, 2022 at 02:51:17PM +0000, Usama Arif wrote: > - percpu_ref_resurrect(ref); > [...] > - percpu_ref_reinit(&ctx->refs); It seems to me that this patch could have also changed --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1911,7 +1911,7 @@ static __cold struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p) ctx->dummy_ubuf->ubuf = -1UL; if (percpu_ref_init(&ctx->refs, io_ring_ctx_ref_free, - PERCPU_REF_ALLOW_REINIT, GFP_KERNEL)) + 0, GFP_KERNEL)) goto err; ctx->flags = p->flags; Or are there any plans to still use the reinit/resurrect functionality of the percpu counter? Thanks, Michal