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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0157EC433FE for ; Tue, 31 May 2022 05:40:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 02DB96B0072; Tue, 31 May 2022 01:40:57 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F1CA16B0073; Tue, 31 May 2022 01:40:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DE4A16B0074; Tue, 31 May 2022 01:40:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id CEF376B0072 for ; Tue, 31 May 2022 01:40:56 -0400 (EDT) Received: from smtpin31.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 8A3E2203CF for ; Tue, 31 May 2022 05:40:56 +0000 (UTC) X-FDA: 79524939312.31.77F491A Received: from mail-pf1-f171.google.com (mail-pf1-f171.google.com [209.85.210.171]) by imf20.hostedemail.com (Postfix) with ESMTP id A558F1C004F for ; Tue, 31 May 2022 05:40:36 +0000 (UTC) Received: by mail-pf1-f171.google.com with SMTP id bo5so12269854pfb.4 for ; Mon, 30 May 2022 22:40:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=xj2ppwBTubnrrIoaUI7eupnOoNnVC4v3eTLLnDbiLG0=; b=juICRplhkiikAtV9FG2KRVdj6JgmGeiIuwdSW2Jg1D7u3nrZPx5ddm5UI8PjHswtHI CFymK9SXuV2jaeTnnalAwMLCkvymbGEqCOwQVHWvOckAE/uqtJ+Eo9PdX0+WtDm1oh9K ID5f74ReZu/lohoVkFicfiSzvGdPytoO48EfMSiHqOXpTTZXovb58Zx9cAUcYqQkyYs+ AqjsOKbc8+pLZ1eqzb3AVeN3R6tfCahxu8R9WwWB5KySB9igPwb4he7o/RvSgddyCf/6 T/LZ2HXjBPnQjU+uXTcxB8W+1JXrVIdNl9UYKvsmH3clvF/lqi5KaYp461c94RCTR5Ve amVA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=xj2ppwBTubnrrIoaUI7eupnOoNnVC4v3eTLLnDbiLG0=; b=5JC2qUl8m9nkJOS0wn/1xbPdqdvXxPkkxSj5Hdt9zlXZfvEGN41ASgpb9Pc7vmKCu0 8EdiiskQ/jT2ccd5CRv/lHmMnJfY5AqpMwmfbyf99ADey4M4itFxjH4JQPe9O4hpyMuc ELK4iu/COm6cGeJmF0VOA3zh6VcZogI0TxyNklthmeIWhMZvnF+qQve/XJnWsEWEIFDI wJilyYAcUA3+VWYdDi8bOlbCDrmvvaH4zwjVE50eAhQLK4Rq/SZQGNh1bsqvVMui86Qa VUo3ERxIHIRgAmL2qBkayXz3ZF7xe9KIrSM5zIpl9wHzzulhjQVGOqILC8W3WJ2Pvj5Z AsdA== X-Gm-Message-State: AOAM532V+8wBsCKefuRBB8CMAjMb0xqiY8gavruN7NlM9vles+xzumoT U4DbanwXgNjEb5tQneFoeA51eQ== X-Google-Smtp-Source: ABdhPJwhxNYAl6sThyj6FBCw9AVxltuG0Rh2A21E2zYsv72fVwQYHfDjIHB6p+DIejj9sWeblTgMng== X-Received: by 2002:a63:6b4a:0:b0:3fb:b03e:d10 with SMTP id g71-20020a636b4a000000b003fbb03e0d10mr15767535pgc.310.1653975647086; Mon, 30 May 2022 22:40:47 -0700 (PDT) Received: from localhost ([2408:8207:18da:2310:7163:3a36:783f:6d4a]) by smtp.gmail.com with ESMTPSA id g1-20020a170902868100b0015e8d4eb25fsm6524570plo.169.2022.05.30.22.40.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 May 2022 22:40:46 -0700 (PDT) Date: Tue, 31 May 2022 13:40:39 +0800 From: Muchun Song To: Zi Yan Cc: Andrew Morton , David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Qian Cai , Vlastimil Babka , Mel Gorman , Eric Ren , Mike Rapoport , Oscar Salvador , Christophe Leroy , Anshuman Khandual Subject: Re: [PATCH] mm: page_isolation: use compound_nr() correctly in isolate_single_pageblock() Message-ID: References: <20220531024450.2498431-1-zi.yan@sent.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220531024450.2498431-1-zi.yan@sent.com> X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: A558F1C004F X-Stat-Signature: x6rh1rpfmsc8jei3849azkfreayb3dgg Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=juICRplh; dmarc=pass (policy=none) header.from=bytedance.com; spf=pass (imf20.hostedemail.com: domain of songmuchun@bytedance.com designates 209.85.210.171 as permitted sender) smtp.mailfrom=songmuchun@bytedance.com X-Rspam-User: X-HE-Tag: 1653975636-757630 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000004, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, May 30, 2022 at 10:44:50PM -0400, Zi Yan wrote: > From: Zi Yan > > When compound_nr(page) was used, page was not guaranteed to be the head > of the compound page and it could cause an infinite loop. Fix it by calling > it on the head page. > > Fixes: b2c9e2fbba32 ("mm: make alloc_contig_range work at pageblock granularity") > Reported-by: Anshuman Khandual > Link: https://lore.kernel.org/linux-mm/20220530115027.123341-1-anshuman.khandual@arm.com/ > Signed-off-by: Zi Yan Acked-by: Muchun Song Thanks.