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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 95CF7C56201 for ; Thu, 19 Nov 2020 16:07:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23A27246E1 for ; Thu, 19 Nov 2020 16:06:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=sent.com header.i=@sent.com header.b="FDLz6gJ+"; dkim=temperror (0-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="A1v6B0Ra" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728077AbgKSQGk (ORCPT ); Thu, 19 Nov 2020 11:06:40 -0500 Received: from wnew2-smtp.messagingengine.com ([64.147.123.27]:59533 "EHLO wnew2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727677AbgKSQGj (ORCPT ); Thu, 19 Nov 2020 11:06:39 -0500 Received: from compute6.internal (compute6.nyi.internal [10.202.2.46]) by mailnew.west.internal (Postfix) with ESMTP id 45ADFE24; Thu, 19 Nov 2020 11:06:37 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute6.internal (MEProxy); Thu, 19 Nov 2020 11:06:38 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sent.com; h=from :to:cc:subject:date:message-id:in-reply-to:references:reply-to :mime-version:content-transfer-encoding; s=fm2; bh=BRsajNq/mgBRP PZp1kutKtKmDBoBjDe/+SYMX/W0D0U=; b=FDLz6gJ+dO7knnH13FpyK8TQaxf+W EYqy2fEmmEG/IteDYR+ZIaWGci0rTPS7vM/oetlWgX+QVU0g41WT/Ou2ffqfgZds ExXBpCw6ptAB1Mv4f5aF2OSAUMj81CsSoglgZ0T20E3lklRHuCYdLCq0NkrFRvZp OdS9XqWyKCz7c5NavdDtXD3/6k7dUVUgj7vkV2U/fbIKkKtzlMyULtYV2ZlEyOFJ Sb+XcLsvN1GgHCf3lBhPst9rcYvLSCENpVfjqQTPcRYsevrcwAkqUTxopNNGhIUd Ohx+5HQW3nR2lTGKpBnP43IGtby7KqJEybOujQ8++9bI9+r42SA4Y502w== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:reply-to:subject :to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; bh=BRsajNq/mgBRPPZp1kutKtKmDBoBjDe/+SYMX/W0D0U=; b=A1v6B0Ra SEHovgQKtdi3lWD/XaTW6wvMauUHvKQBSs8n2sQSI/HszBpuYS5deYD2sE0oQWGn KhBTR2Dqw3hysWRElAx0QaGKqlUXZCO84PXqauI3oqyLZ0XBhhOsbzDz3qJie+QY efBDx6pv1qWH3qgZMlR8EwUFjwwQpBDOZ1fLXi60k2UtzwUfAAIqKO8KvbFv3eUR b5Hrvn8TctVtEfHd510qV1b+7ZMhXlpfgVSYsot+zeId0txzHerLBR6HS0bwL6Yz uxByuDuCMR67r0e+lqMJfobqelQf8PtazJRoJIjQ0wRRKbdLcTVKwCLl4uOIXr4c 65Avdcmq85GcpA== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedujedrudefjedgkeefucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvufffkffojghfrhgggfestdhqredtredttdenucfhrhhomhepkghiucgj rghnuceoiihirdihrghnsehsvghnthdrtghomheqnecuggftrfgrthhtvghrnhepieejue dvueduuefhgefhheeiuedvtedvuefgieegveetueeiueehtdegudehfeelnecukfhppedu vddrgeeirddutdeirdduieegnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpe hmrghilhhfrhhomhepiihirdihrghnsehsvghnthdrtghomh X-ME-Proxy: Received: from nvrsysarch6.NVidia.COM (unknown [12.46.106.164]) by mail.messagingengine.com (Postfix) with ESMTPA id D12EE3064AAE; Thu, 19 Nov 2020 11:06:35 -0500 (EST) From: Zi Yan To: linux-mm@kvack.org, Matthew Wilcox , "Kirill A . Shutemov" Cc: Roman Gushchin , Andrew Morton , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Yang Shi , Michal Hocko , John Hubbard , Ralph Campbell , David Nellans , Zi Yan Subject: [PATCH 1/7] XArray: Fix splitting to non-zero orders Date: Thu, 19 Nov 2020 11:05:59 -0500 Message-Id: <20201119160605.1272425-2-zi.yan@sent.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201119160605.1272425-1-zi.yan@sent.com> References: <20201119160605.1272425-1-zi.yan@sent.com> Reply-To: Zi Yan MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Matthew Wilcox (Oracle)" Splitting an order-4 entry into order-2 entries would leave the array containing pointers to 000040008000c000 instead of 000044448888cccc. This is a one-character fix, but enhance the test suite to check this case. Reported-by: Zi Yan Signed-off-by: Matthew Wilcox (Oracle) --- lib/test_xarray.c | 26 ++++++++++++++------------ lib/xarray.c | 4 ++-- 2 files changed, 16 insertions(+), 14 deletions(-) diff --git a/lib/test_xarray.c b/lib/test_xarray.c index 8294f43f4981..8b1c318189ce 100644 --- a/lib/test_xarray.c +++ b/lib/test_xarray.c @@ -1530,24 +1530,24 @@ static noinline void check_store_range(struct xarra= y *xa) =20 #ifdef CONFIG_XARRAY_MULTI static void check_split_1(struct xarray *xa, unsigned long index, - unsigned int order) + unsigned int order, unsigned int new_order) { - XA_STATE(xas, xa, index); - void *entry; - unsigned int i =3D 0; + XA_STATE_ORDER(xas, xa, index, new_order); + unsigned int i; =20 xa_store_order(xa, index, order, xa, GFP_KERNEL); =20 xas_split_alloc(&xas, xa, order, GFP_KERNEL); xas_lock(&xas); xas_split(&xas, xa, order); + for (i =3D 0; i < (1 << order); i +=3D (1 << new_order)) + __xa_store(xa, index + i, xa_mk_index(index + i), 0); xas_unlock(&xas); =20 - xa_for_each(xa, index, entry) { - XA_BUG_ON(xa, entry !=3D xa); - i++; + for (i =3D 0; i < (1 << order); i++) { + unsigned int val =3D index + (i & ~((1 << new_order) - 1)); + XA_BUG_ON(xa, xa_load(xa, index + i) !=3D xa_mk_index(val)); } - XA_BUG_ON(xa, i !=3D 1 << order); =20 xa_set_mark(xa, index, XA_MARK_0); XA_BUG_ON(xa, !xa_get_mark(xa, index, XA_MARK_0)); @@ -1557,14 +1557,16 @@ static void check_split_1(struct xarray *xa, unsign= ed long index, =20 static noinline void check_split(struct xarray *xa) { - unsigned int order; + unsigned int order, new_order; =20 XA_BUG_ON(xa, !xa_empty(xa)); =20 for (order =3D 1; order < 2 * XA_CHUNK_SHIFT; order++) { - check_split_1(xa, 0, order); - check_split_1(xa, 1UL << order, order); - check_split_1(xa, 3UL << order, order); + for (new_order =3D 0; new_order < order; new_order++) { + check_split_1(xa, 0, order, new_order); + check_split_1(xa, 1UL << order, order, new_order); + check_split_1(xa, 3UL << order, order, new_order); + } } } #else diff --git a/lib/xarray.c b/lib/xarray.c index fc70e37c4c17..74915ba018c4 100644 --- a/lib/xarray.c +++ b/lib/xarray.c @@ -1012,7 +1012,7 @@ void xas_split_alloc(struct xa_state *xas, void *entr= y, unsigned int order, =20 do { unsigned int i; - void *sibling; + void *sibling =3D NULL; struct xa_node *node; =20 node =3D kmem_cache_alloc(radix_tree_node_cachep, gfp); @@ -1022,7 +1022,7 @@ void xas_split_alloc(struct xa_state *xas, void *entr= y, unsigned int order, for (i =3D 0; i < XA_CHUNK_SIZE; i++) { if ((i & mask) =3D=3D 0) { RCU_INIT_POINTER(node->slots[i], entry); - sibling =3D xa_mk_sibling(0); + sibling =3D xa_mk_sibling(i); } else { RCU_INIT_POINTER(node->slots[i], sibling); } --=20 2.28.0