From nobody Wed Dec 17 14:05:39 2025 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AB761CA64 for ; Mon, 24 Jun 2024 04:42:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719204168; cv=none; b=C7j/5hRdD73pAnH5nktJHYbAceZ+zf9KptGQ+l4lfZl64YAmi2aSnEbyPd1xgyAaXxpy9b/knjbO5FXf7X8s1xh+omFjw74fGhPabTJ0neNPLbSijAwt7GKAXs4hFG2sXgWjGlmmU1btZuT3/xTWeCyiHzA0/naQjFFLTcLArhg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719204168; c=relaxed/simple; bh=VO6rn1iRJpsezuy47uDlROc9yR1Lzf670tKqqbjH2JY=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=TVfZn72a3mnIaMel9t0GlSBnaACpQw5jm72m8kZWgk9Hg42szVglYwt1JDJfRZ/Uf0MfdtWfqDRlJCYTUKvWI/Mv45LyJbw/QHXoUwfjTSToIq1+oZbO6OOPs6k6QD6i8lHDT1WGW/Syv2wzYpGjQ4iGl4XfNLnjJ52PcXAFCn4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: 2b68c9dc31e411ef9305a59a3cc225df-20240624 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.38,REQID:53c491e2-b8da-4ec8-862d-4f50d5d39a69,IP:15, URL:0,TC:0,Content:0,EDM:25,RT:0,SF:5,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:45 X-CID-INFO: VERSION:1.1.38,REQID:53c491e2-b8da-4ec8-862d-4f50d5d39a69,IP:15,UR L:0,TC:0,Content:0,EDM:25,RT:0,SF:5,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:45 X-CID-META: VersionHash:82c5f88,CLOUDID:728743b82fceb780fd9822236738bdd0,BulkI D:24062412423347W5T7XY,BulkQuantity:0,Recheck:0,SF:19|43|74|66|25|72|102,T C:nil,Content:0,EDM:5,IP:-2,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil, COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_FSD,TF_CID_SPAM_FSI X-UUID: 2b68c9dc31e411ef9305a59a3cc225df-20240624 X-User: lizhenneng@kylinos.cn Received: from localhost.localdomain [(116.128.244.171)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA) with ESMTP id 923631648; Mon, 24 Jun 2024 12:42:32 +0800 From: Zhenneng Li To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH] migrate_pages: modify max number of pages to migrate in batch Date: Mon, 24 Jun 2024 12:41:40 +0800 Message-Id: <20240624044140.117196-1-lizhenneng@kylinos.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" We restrict the number of pages to be migrated to no more than HPAGE_PMD_NR or NR_MAX_BATCHED_MIGRATION, but in fact, the number of pages to be migrated may reach 2*HPAGE_PMD_NR-1 or 2 *NR_MAX_BATCHED_MIGRATION-1, it's not in inconsistent with the context. Please refer to the patch: 42012e0436d4(migrate_pages: restrict number of pages to migrate in batch) Signed-off-by: Zhenneng Li --- mm/migrate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/migrate.c b/mm/migrate.c index 781979567f64..7a4b37aac9e8 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1961,7 +1961,7 @@ int migrate_pages(struct list_head *from, new_folio_t= get_new_folio, break; } if (nr_pages >=3D NR_MAX_BATCHED_MIGRATION) - list_cut_before(&folios, from, &folio2->lru); + list_cut_before(&folios, from, &folio->lru); else list_splice_init(from, &folios); if (mode =3D=3D MIGRATE_ASYNC) --=20 2.25.1