From patchwork Fri Aug 25 13:54:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hao Xu X-Patchwork-Id: 13365951 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 63011C79F64 for ; Fri, 25 Aug 2023 14:05:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236347AbjHYOFE (ORCPT ); Fri, 25 Aug 2023 10:05:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245759AbjHYOEs (ORCPT ); Fri, 25 Aug 2023 10:04:48 -0400 Received: from out-248.mta1.migadu.com (out-248.mta1.migadu.com [IPv6:2001:41d0:203:375::f8]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 057342722; Fri, 25 Aug 2023 07:04:23 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1692972248; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZAHRQkTlH3B9Ayy3ByDVW6IFO8x4JKviNIiMKvNnRxw=; b=rqq9t63T1b93nHdvHPb4iPnifbVgNhCPhaGA0/+lVUtdq72oLevGN3oePkSOWgj4tFeMJO 883BuPqR+igY5LuYYZDHjdap5mSmKgc54EL0giqHkQRTPmks0t1/1oKfHQU1t1pMyd2ThX 7baCMPgFPzeqpA42kG/A+w1RFMlPw/c= From: Hao Xu To: io-uring@vger.kernel.org, Jens Axboe Cc: Dominique Martinet , Pavel Begunkov , Christian Brauner , Alexander Viro , Stefan Roesch , Clay Harris , Dave Chinner , "Darrick J . Wong" , linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-cachefs@redhat.com, ecryptfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-unionfs@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org, codalist@coda.cs.cmu.edu, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-mm@kvack.org, linux-nilfs@vger.kernel.org, devel@lists.orangefs.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-mtd@lists.infradead.org, Wanpeng Li Subject: [PATCH 22/29] xfs: comment page allocation for nowait case in xfs_buf_find_insert() Date: Fri, 25 Aug 2023 21:54:24 +0800 Message-Id: <20230825135431.1317785-23-hao.xu@linux.dev> In-Reply-To: <20230825135431.1317785-1-hao.xu@linux.dev> References: <20230825135431.1317785-1-hao.xu@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Hao Xu Add comments for page allocation in nowait case in xfs_buf_find_insert() Signed-off-by: Hao Xu --- fs/xfs/xfs_buf.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index eb3cd7702545..57bdc4c5dde1 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -633,6 +633,8 @@ xfs_buf_find_insert( * allocate the memory from the heap to minimise memory usage. If we * can't get heap memory for these small buffers, we fall back to using * the page allocator. + * xfs_buf_alloc_kmem may return -EAGAIN, let's not return it but turn + * to page allocator as well. */ if (BBTOB(new_bp->b_length) >= PAGE_SIZE || xfs_buf_alloc_kmem(new_bp, flags) < 0) {