From patchwork Wed May 29 13:45:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Pankaj Raghav (Samsung)" X-Patchwork-Id: 13678899 Received: from mout-p-201.mailbox.org (mout-p-201.mailbox.org [80.241.56.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 41B211CAB9; Wed, 29 May 2024 13:45:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716990357; cv=none; b=nc2eoJ3CqJbKWlsTZD1hl4PjyBzaSarHDH6V6GQRNfaSICUkapQU/EA7rGcSXcUpwDWHxMUCYIxfCyTMMoEuL6yTniL0GgBKPliCfHEGES1xRDKvYgT8voDYy1ZcBXHJwmflwxZw/OLvDvSknFd+JZvXoFcyxay9Xxrg3hZV7DU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716990357; c=relaxed/simple; bh=IHNS2vBVtCoLav5/XzYompHddU+6dBvnI/6xE7w7hTw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=bkIbW+7IxFJfNx0AlfumtwKM0HliJaYfuI78VI2WZnVK6lrjEDGvHyPdiYmcEWc92XOOmP96Q35cVFBkLp03Cc0Cgycr7bkA5J4dKl6yC6oVgqDnL33Yx7xwzf7kb/tKtLxw7PExjnwkWbGlISDqFOoLpYAoTEp8hoCGHdSI9E0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=pankajraghav.com; spf=pass smtp.mailfrom=pankajraghav.com; dkim=pass (2048-bit key) header.d=pankajraghav.com header.i=@pankajraghav.com header.b=XtmSRYj1; arc=none smtp.client-ip=80.241.56.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=pankajraghav.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pankajraghav.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=pankajraghav.com header.i=@pankajraghav.com header.b="XtmSRYj1" Received: from smtp102.mailbox.org (smtp102.mailbox.org [IPv6:2001:67c:2050:b231:465::102]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-201.mailbox.org (Postfix) with ESMTPS id 4Vq9dD5WLlz9srg; Wed, 29 May 2024 15:45:52 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=pankajraghav.com; s=MBO0001; t=1716990352; 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=1QtcK2fxbZ+x1HZw3p1m35+0G7d81xL3TX3Jwuj1ZS8=; b=XtmSRYj18h9+1ShKisqhJuhbvmFNCkHXkrsU/DwgyRVYGbZx8dom0yMEQL7U9ngd+ACH4q cxANxsQsXNqDYf8t3VO+RKQajOU6g5SL1w1u7KAPSRb/8t+qJDmTlMMY5mgfCtJmjGkyar bdQ9ZZcUFfZKkPiJLjPDGura3CWpql6cfv3N9B0ri29HyUB6pM3I8nI/LJyKIPoAZ3mzUS Mfp5TcBEP7f0p6iI0cliKqVakwYXw15t2f0GrFMq7FtHYWmgIjbsMbjDuueEkNec3nLCXO UdBFXpbh1KzrRFqCrVS6KA2ZvQiIe8nHUUkiYFbT3YhJndAYblsnR1RihCReEA== From: "Pankaj Raghav (Samsung)" To: david@fromorbit.com, chandan.babu@oracle.com, akpm@linux-foundation.org, brauner@kernel.org, willy@infradead.org, djwong@kernel.org Cc: linux-kernel@vger.kernel.org, hare@suse.de, john.g.garry@oracle.com, gost.dev@samsung.com, yang@os.amperecomputing.com, p.raghav@samsung.com, cl@os.amperecomputing.com, linux-xfs@vger.kernel.org, hch@lst.de, mcgrof@kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Dave Chinner , Pankaj Raghav Subject: [PATCH v6 08/11] xfs: use kvmalloc for xattr buffers Date: Wed, 29 May 2024 15:45:06 +0200 Message-Id: <20240529134509.120826-9-kernel@pankajraghav.com> In-Reply-To: <20240529134509.120826-1-kernel@pankajraghav.com> References: <20240529134509.120826-1-kernel@pankajraghav.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Rspamd-Queue-Id: 4Vq9dD5WLlz9srg From: Dave Chinner Pankaj Raghav reported that when filesystem block size is larger than page size, the xattr code can use kmalloc() for high order allocations. This triggers a useless warning in the allocator as it is a __GFP_NOFAIL allocation here: static inline struct page *rmqueue(struct zone *preferred_zone, struct zone *zone, unsigned int order, gfp_t gfp_flags, unsigned int alloc_flags, int migratetype) { struct page *page; /* * We most definitely don't want callers attempting to * allocate greater than order-1 page units with __GFP_NOFAIL. */ >>>> WARN_ON_ONCE((gfp_flags & __GFP_NOFAIL) && (order > 1)); ... Fix this by changing all these call sites to use kvmalloc(), which will strip the NOFAIL from the kmalloc attempt and if that fails will do a __GFP_NOFAIL vmalloc(). This is not an issue that productions systems will see as filesystems with block size > page size cannot be mounted by the kernel; Pankaj is developing this functionality right now. Reported-by: Pankaj Raghav Fixes: f078d4ea8276 ("xfs: convert kmem_alloc() to kmalloc()") Signed-off-by: Dave Chinner Reviewed-by: Darrick J. Wong Reviewed-by: Pankaj Raghav --- fs/xfs/libxfs/xfs_attr_leaf.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c index b9e98950eb3d..09f4cb061a6e 100644 --- a/fs/xfs/libxfs/xfs_attr_leaf.c +++ b/fs/xfs/libxfs/xfs_attr_leaf.c @@ -1138,10 +1138,7 @@ xfs_attr3_leaf_to_shortform( trace_xfs_attr_leaf_to_sf(args); - tmpbuffer = kmalloc(args->geo->blksize, GFP_KERNEL | __GFP_NOFAIL); - if (!tmpbuffer) - return -ENOMEM; - + tmpbuffer = kvmalloc(args->geo->blksize, GFP_KERNEL | __GFP_NOFAIL); memcpy(tmpbuffer, bp->b_addr, args->geo->blksize); leaf = (xfs_attr_leafblock_t *)tmpbuffer; @@ -1205,7 +1202,7 @@ xfs_attr3_leaf_to_shortform( error = 0; out: - kfree(tmpbuffer); + kvfree(tmpbuffer); return error; } @@ -1613,7 +1610,7 @@ xfs_attr3_leaf_compact( trace_xfs_attr_leaf_compact(args); - tmpbuffer = kmalloc(args->geo->blksize, GFP_KERNEL | __GFP_NOFAIL); + tmpbuffer = kvmalloc(args->geo->blksize, GFP_KERNEL | __GFP_NOFAIL); memcpy(tmpbuffer, bp->b_addr, args->geo->blksize); memset(bp->b_addr, 0, args->geo->blksize); leaf_src = (xfs_attr_leafblock_t *)tmpbuffer; @@ -1651,7 +1648,7 @@ xfs_attr3_leaf_compact( */ xfs_trans_log_buf(trans, bp, 0, args->geo->blksize - 1); - kfree(tmpbuffer); + kvfree(tmpbuffer); } /* @@ -2330,7 +2327,7 @@ xfs_attr3_leaf_unbalance( struct xfs_attr_leafblock *tmp_leaf; struct xfs_attr3_icleaf_hdr tmphdr; - tmp_leaf = kzalloc(state->args->geo->blksize, + tmp_leaf = kvzalloc(state->args->geo->blksize, GFP_KERNEL | __GFP_NOFAIL); /* @@ -2371,7 +2368,7 @@ xfs_attr3_leaf_unbalance( } memcpy(save_leaf, tmp_leaf, state->args->geo->blksize); savehdr = tmphdr; /* struct copy */ - kfree(tmp_leaf); + kvfree(tmp_leaf); } xfs_attr3_leaf_hdr_to_disk(state->args->geo, save_leaf, &savehdr);