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=-6.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 8DC3AC43219 for ; Tue, 30 Apr 2019 11:46:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D306217D9 for ; Tue, 30 Apr 2019 11:46:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556624784; bh=c88ScI8Uuvx5NjijKog5n0S0P2zYo9cGOcNXG3Coaa4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=FHNodynYH+EE/kYyJFHzdbRZIxZS4LtXBatn06xlVxAYJ9yOnsSABJnhHO3m6T14m OBEzlLo2qM5ivrMWSoCIZKkESf+aUV8jjg+afguFmP7cymZ78uH6wRR9lD1wXzRkQX sJ78F2W1DMWFSatM+4Dl51a9ymApdJvugIzQ8Mvg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730539AbfD3LqW (ORCPT ); Tue, 30 Apr 2019 07:46:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:59178 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730169AbfD3LqU (ORCPT ); Tue, 30 Apr 2019 07:46:20 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3F10D21707; Tue, 30 Apr 2019 11:46:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556624779; bh=c88ScI8Uuvx5NjijKog5n0S0P2zYo9cGOcNXG3Coaa4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=02vV3lYxajuSL/ejIxuD8htvAMTeoLEU4ETPmfIkaBulTMrLaDFJX7DqxIN3WRmom g0HmQQLU2nDpie32lU4LoC1H8sTBHubumcsjkhTHJCh8F+tply4DfrVvNM0Mw1YdpS GMwPtUkAzAj2pElqYy86yjXzn11uZDdnebgdszK4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christoph Hellwig , Jens Axboe , Guenter Roeck Subject: [PATCH 4.19 069/100] aio: dont zero entire aio_kiocb aio_get_req() Date: Tue, 30 Apr 2019 13:38:38 +0200 Message-Id: <20190430113612.026422243@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190430113608.616903219@linuxfoundation.org> References: <20190430113608.616903219@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jens Axboe commit 2bc4ca9bb600cbe36941da2b2a67189fc4302a04 upstream. It's 192 bytes, fairly substantial. Most items don't need to be cleared, especially not upfront. Clear the ones we do need to clear, and leave the other ones for setup when the iocb is prepared and submitted. Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe Cc: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- fs/aio.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) --- a/fs/aio.c +++ b/fs/aio.c @@ -1010,14 +1010,15 @@ static inline struct aio_kiocb *aio_get_ { struct aio_kiocb *req; - req = kmem_cache_alloc(kiocb_cachep, GFP_KERNEL|__GFP_ZERO); + req = kmem_cache_alloc(kiocb_cachep, GFP_KERNEL); if (unlikely(!req)) return NULL; percpu_ref_get(&ctx->reqs); + req->ki_ctx = ctx; INIT_LIST_HEAD(&req->ki_list); refcount_set(&req->ki_refcnt, 0); - req->ki_ctx = ctx; + req->ki_eventfd = NULL; return req; } @@ -1738,6 +1739,10 @@ static ssize_t aio_poll(struct aio_kiocb if (unlikely(!req->file)) return -EBADF; + req->head = NULL; + req->woken = false; + req->cancelled = false; + apt.pt._qproc = aio_poll_queue_proc; apt.pt._key = req->events; apt.iocb = aiocb;