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 EC8E7CD37B0 for ; Mon, 18 Sep 2023 16:31:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229810AbjIRQbp (ORCPT ); Mon, 18 Sep 2023 12:31:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229864AbjIRQbc (ORCPT ); Mon, 18 Sep 2023 12:31:32 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FC183AB4 for ; Mon, 18 Sep 2023 09:29:08 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B380FC116A4; Mon, 18 Sep 2023 16:29:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1695054547; bh=mTES+fS+l057DOHGr6cyqba99SNFHgoZ90VgtVZaVvs=; h=Date:To:From:Subject:From; b=mz/Xp2ppu7EFkKSat7e2Z5cSshKf4Y+tf08dreRsjdwmBlcjTYGRyz7cUzL5uhser 3czSo4yghp3DAD4HLJ2eeuK2Ty+nnBgN0nIUzFaqnf1f4/vIJWiAN5kaW6SfpelRzm St1XZgXzm5Z7MKBp/oBdffWcjAymdAE7Z0E2i2is= Date: Mon, 18 Sep 2023 09:29:07 -0700 To: mm-commits@vger.kernel.org, zhangpeng.00@bytedance.com, willy@infradead.org, surenb@google.com, Liam.Howlett@oracle.com, jason.sim@samsung.com, akpm@linux-foundation.org From: Andrew Morton Subject: + maple_tree-use-mas_node_count_gfp-on-mas_expected_entries.patch added to mm-hotfixes-unstable branch Message-Id: <20230918162907.B380FC116A4@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: maple_tree: use mas_node_count_gfp() in mas_expected_entries() has been added to the -mm mm-hotfixes-unstable branch. Its filename is maple_tree-use-mas_node_count_gfp-on-mas_expected_entries.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-use-mas_node_count_gfp-on-mas_expected_entries.patch This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Jaeseon Sim Subject: maple_tree: use mas_node_count_gfp() in mas_expected_entries() Date: Fri, 15 Sep 2023 18:32:43 +0900 Use mas_node_count_gfp with GFP_KERNEL instead of GFP_NOWAIT | __GFP_NOWARN on mas_expected_entries in order to allow memory reclaim. Currently, fork errors occur on low free memory as follows: Zygote : Failed to fork child process: Out of memory (12) -ENOMEM was returned as following path: mas_node_count mas_expected_entries dup_mmap dup_mm copy_mm copy_process Link: https://lkml.kernel.org/r/20230915093243epcms1p46fa00bbac1ab7b7dca94acb66c44c456@epcms1p4 Signed-off-by: Jaeseon Sim Cc: "Liam R. Howlett" Cc: Matthew Wilcox (Oracle) Cc: Peng Zhang Cc: Suren Baghdasaryan Signed-off-by: Andrew Morton --- lib/maple_tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/lib/maple_tree.c~maple_tree-use-mas_node_count_gfp-on-mas_expected_entries +++ a/lib/maple_tree.c @@ -5574,7 +5574,7 @@ int mas_expected_entries(struct ma_state /* Internal nodes */ nr_nodes += DIV_ROUND_UP(nr_nodes, nonleaf_cap); /* Add working room for split (2 nodes) + new parents */ - mas_node_count(mas, nr_nodes + 3); + mas_node_count_gfp(mas, nr_nodes + 3, GFP_KERNEL); /* Detect if allocations run out */ mas->mas_flags |= MA_STATE_PREALLOC; _ Patches currently in -mm which might be from jason.sim@samsung.com are maple_tree-use-mas_node_count_gfp-on-mas_expected_entries.patch