From patchwork Tue Oct 24 09:33:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chengming Zhou X-Patchwork-Id: 13434157 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7BDBAC00A8F for ; Tue, 24 Oct 2023 09:34:13 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 114396B0203; Tue, 24 Oct 2023 05:34:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0C03C6B0204; Tue, 24 Oct 2023 05:34:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ECBDA6B0205; Tue, 24 Oct 2023 05:34:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id D77C36B0203 for ; Tue, 24 Oct 2023 05:34:09 -0400 (EDT) Received: from smtpin28.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id BEDA7B625F for ; Tue, 24 Oct 2023 09:34:09 +0000 (UTC) X-FDA: 81379843818.28.4834CC8 Received: from out-199.mta0.migadu.com (out-199.mta0.migadu.com [91.218.175.199]) by imf22.hostedemail.com (Postfix) with ESMTP id 022CEC0024 for ; Tue, 24 Oct 2023 09:34:07 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=gykdRjMa; spf=pass (imf22.hostedemail.com: domain of chengming.zhou@linux.dev designates 91.218.175.199 as permitted sender) smtp.mailfrom=chengming.zhou@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1698140048; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=UijxEztLRTexuc2wmlND22JYjAvU8peNSSAQw8rq2PA=; b=q58/h+0aJYkxdH8lIJDRR36oIGn0A6QYXhXaJAihM1R/jyOno1tVJpmakQcu2xCwi+po9Z XO9JZKkPbeyIedZRCVBd4DcHDezmH3mHGkVoGn3wZ4anwrNonFGlOlO7gzQKINXdkrfB/p W2oK7kgDm+USrZuqWFQpBanmjDQtJEs= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1698140048; a=rsa-sha256; cv=none; b=3I3xX3L2Y0TXIQwbDucIon3UD56Fn4vAVCieV+lWfUbBXZmgkxYaYnKHuYUUHLtlKZeOHj BavlnGqScxE/K90V/MlFIWiCB/IouvxrWX0b3KkgJ7yJgw8LWNNoQ8Pn/xAB1WGgxgj8SP N4fraQE6KmOHgj2Rkuc2f5gBp7VJU7o= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=gykdRjMa; spf=pass (imf22.hostedemail.com: domain of chengming.zhou@linux.dev designates 91.218.175.199 as permitted sender) smtp.mailfrom=chengming.zhou@linux.dev; dmarc=pass (policy=none) header.from=linux.dev 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=1698140046; 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=UijxEztLRTexuc2wmlND22JYjAvU8peNSSAQw8rq2PA=; b=gykdRjMal5sST/bB2trCR8USAxy2UxFWhSeBpIeqaRzeF5OYDFVsgF9netz4vEDOO1YDYl eTbp0AKHNXuWCACBnN9eOw9UgYy91M8GYL3m9MQgwc5I0MLP0NIaEzdLHE9x29GwvY+Peq YX7cFeuPsGeiRsn56VsLqoroQhjglBc= From: chengming.zhou@linux.dev To: cl@linux.com, penberg@kernel.org Cc: rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, vbabka@suse.cz, roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, chengming.zhou@linux.dev, Chengming Zhou Subject: [RFC PATCH v3 5/7] slub: Introduce freeze_slab() Date: Tue, 24 Oct 2023 09:33:43 +0000 Message-Id: <20231024093345.3676493-6-chengming.zhou@linux.dev> In-Reply-To: <20231024093345.3676493-1-chengming.zhou@linux.dev> References: <20231024093345.3676493-1-chengming.zhou@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 022CEC0024 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: 7f1wgxg4g9ar3wn5jubqkcbawmei1fcc X-HE-Tag: 1698140047-592575 X-HE-Meta: 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 cm9se6tC P/We++hcu+C1Ru5f7l6dqjufmkSielFd5QX4Kvzsj+ketR5BgHxfx5L67ajOy1Tw7RCBLhPAuyYvLm8yhqEk9m86U5bQBu4ZdSe82cS2UH5bavu+gCylGs7CtJ1w+OnTbQsY+iIw2fBpvKqNWpFSProkFH8I769eJY19viF3MU/A+c3QlFSNB5jR7EhG68sJUCvPNj4vt2LsWiKGw+0fUrr3ee0ZN5bsuXhP7WDAW9YAmHQ2a/epWG86FeJD2AZf7x9zF X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Chengming Zhou We will have unfrozen slabs out of the node partial list later, so we need a freeze_slab() function to freeze the partial slab and get its freelist. Signed-off-by: Chengming Zhou Reviewed-by: Vlastimil Babka --- mm/slub.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/mm/slub.c b/mm/slub.c index 7d0234bffad3..5b428648021f 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3079,6 +3079,33 @@ static inline void *get_freelist(struct kmem_cache *s, struct slab *slab) return freelist; } +/* + * Freeze the partial slab and return the pointer to the freelist. + */ +static inline void *freeze_slab(struct kmem_cache *s, struct slab *slab) +{ + struct slab new; + unsigned long counters; + void *freelist; + + do { + freelist = slab->freelist; + counters = slab->counters; + + new.counters = counters; + VM_BUG_ON(new.frozen); + + new.inuse = slab->objects; + new.frozen = 1; + + } while (!__slab_update_freelist(s, slab, + freelist, counters, + NULL, new.counters, + "freeze_slab")); + + return freelist; +} + /* * Slow path. The lockless freelist is empty or we need to perform * debugging duties.