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[2620:137:e000::1:20]) by mx.google.com with ESMTP id z4-20020aa78884000000b00679cdcafec1si2980119pfe.109.2023.07.28.02.52.03; Fri, 28 Jul 2023 02:52:16 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235387AbjG1JNo (ORCPT + 99 others); Fri, 28 Jul 2023 05:13:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33920 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232776AbjG1JMj (ORCPT ); Fri, 28 Jul 2023 05:12:39 -0400 Received: from dggsgout12.his.huawei.com (unknown [45.249.212.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A6C044B2 for ; Fri, 28 Jul 2023 02:10:20 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTP id 4RC20Q5DXlz4f3nyv for ; Fri, 28 Jul 2023 17:10:14 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.124.27]) by APP4 (Coremail) with SMTP id gCh0CgA3n7L1hcNkCrD+Ow--.32454S6; Fri, 28 Jul 2023 17:10:17 +0800 (CST) From: Kemeng Shi To: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, baolin.wang@linux.alibaba.com, mgorman@techsingularity.net, willy@infradead.org, david@redhat.com Cc: shikemeng@huaweicloud.com Subject: [PATCH 4/8] mm/compaction: remove stale fast_find_block flag in isolate_migratepages Date: Sat, 29 Jul 2023 01:10:33 +0800 Message-Id: <20230728171037.2219226-5-shikemeng@huaweicloud.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20230728171037.2219226-1-shikemeng@huaweicloud.com> References: <20230728171037.2219226-1-shikemeng@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: gCh0CgA3n7L1hcNkCrD+Ow--.32454S6 X-Coremail-Antispam: 1UD129KBjvJXoW7ArW3uFWUWF1fuFykCryUZFb_yoW8tFWxpw 1fJwn7GF4DGa43W3ZIqFyDZ3W5Cw1fKF17JrW7Kw18AFnxtFnF93Z7tFnYvFyFqr9avF90 vr4Dta4Iya1jva7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPY14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2jI8I6cxK62vIxIIY0VWUZVW8XwA2048vs2IY02 0E87I2jVAFwI0_JF0E3s1l82xGYIkIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0 rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6x IIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xv wVC2z280aVCY1x0267AKxVW0oVCq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFc xC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_ Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2 IErcIFxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E 14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIx kGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAF wI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r 4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0pRKFAPU UUUU= X-CM-SenderInfo: 5vklyvpphqwq5kxd4v5lfo033gof0z/ X-CFilter-Loop: Reflected X-Spam-Status: No, score=0.0 required=5.0 tests=BAYES_00,DATE_IN_FUTURE_06_12, KHOP_HELO_FCRDNS,MAY_BE_FORGED,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772657508248593652 X-GMAIL-MSGID: 1772657508248593652 In old code, we set skip to found page block in fast_find_migrateblock. So we use fast_find_block to avoid skip found page block from fast_find_migrateblock. In 90ed667c03fe5 ("Revert "Revert "mm/compaction: fix set skip in fast_find_migrateblock"""), we remove skip set in fast_find_migrateblock, then fast_find_block is useless. Signed-off-by: Kemeng Shi --- mm/compaction.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/mm/compaction.c b/mm/compaction.c index ad535f880c70..09c36251c613 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -1949,7 +1949,6 @@ static isolate_migrate_t isolate_migratepages(struct compact_control *cc) const isolate_mode_t isolate_mode = (sysctl_compact_unevictable_allowed ? ISOLATE_UNEVICTABLE : 0) | (cc->mode != MIGRATE_SYNC ? ISOLATE_ASYNC_MIGRATE : 0); - bool fast_find_block; /* * Start at where we last stopped, or beginning of the zone as @@ -1961,13 +1960,6 @@ static isolate_migrate_t isolate_migratepages(struct compact_control *cc) if (block_start_pfn < cc->zone->zone_start_pfn) block_start_pfn = cc->zone->zone_start_pfn; - /* - * fast_find_migrateblock marks a pageblock skipped so to avoid - * the isolation_suitable check below, check whether the fast - * search was successful. - */ - fast_find_block = low_pfn != cc->migrate_pfn && !cc->fast_search_fail; - /* Only scan within a pageblock boundary */ block_end_pfn = pageblock_end_pfn(low_pfn); @@ -1976,7 +1968,6 @@ static isolate_migrate_t isolate_migratepages(struct compact_control *cc) * Do not cross the free scanner. */ for (; block_end_pfn <= cc->free_pfn; - fast_find_block = false, cc->migrate_pfn = low_pfn = block_end_pfn, block_start_pfn = block_end_pfn, block_end_pfn += pageblock_nr_pages) { @@ -2007,8 +1998,7 @@ static isolate_migrate_t isolate_migratepages(struct compact_control *cc) * before making it "skip" so other compaction instances do * not scan the same block. */ - if (pageblock_aligned(low_pfn) && - !fast_find_block && !isolation_suitable(cc, page)) + if (pageblock_aligned(low_pfn) && !isolation_suitable(cc, page)) continue; /*