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Fri, 18 Dec 2020 10:22:26 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 35e6eujq18-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 18 Dec 2020 10:22:26 +0000 Received: from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 0BIAMP4P021858; Fri, 18 Dec 2020 10:22:25 GMT Received: from jian-L460.jp.oracle.com (/10.191.3.55) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 18 Dec 2020 02:22:24 -0800 From: Jacob Wen To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: akpm@linux-foundation.org, jian.w.wen@oracle.com Subject: [PATCH] mm/vmscan: DRY cleanup for do_try_to_free_pages() Date: Fri, 18 Dec 2020 18:22:17 +0800 Message-Id: <20201218102217.186836-1-jian.w.wen@oracle.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9838 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=35 mlxscore=0 phishscore=0 bulkscore=0 suspectscore=0 malwarescore=0 mlxlogscore=999 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012180075 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9838 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 mlxlogscore=999 priorityscore=1501 mlxscore=0 suspectscore=0 adultscore=6 phishscore=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012180075 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000415, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch reduces repetition of set_task_reclaim_state() around do_try_to_free_pages(). Signed-off-by: Jacob Wen --- mm/vmscan.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 257cba79a96d..4bc244b23686 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3023,6 +3023,10 @@ static unsigned long do_try_to_free_pages(struct z= onelist *zonelist, pg_data_t *last_pgdat; struct zoneref *z; struct zone *zone; + unsigned long ret; + + set_task_reclaim_state(current, &sc->reclaim_state); + retry: delayacct_freepages_start(); =20 @@ -3069,12 +3073,16 @@ static unsigned long do_try_to_free_pages(struct = zonelist *zonelist, =20 delayacct_freepages_end(); =20 - if (sc->nr_reclaimed) - return sc->nr_reclaimed; + if (sc->nr_reclaimed) { + ret =3D sc->nr_reclaimed; + goto out; + } =20 /* Aborted reclaim to try compaction? don't OOM, then */ - if (sc->compaction_ready) - return 1; + if (sc->compaction_ready) { + ret =3D 1; + goto out; + } =20 /* * We make inactive:active ratio decisions based on the node's @@ -3101,7 +3109,10 @@ static unsigned long do_try_to_free_pages(struct z= onelist *zonelist, goto retry; } =20 - return 0; + ret =3D 0; +out: + set_task_reclaim_state(current, NULL); + return ret; } =20 static bool allow_direct_reclaim(pg_data_t *pgdat) @@ -3269,13 +3280,11 @@ unsigned long try_to_free_pages(struct zonelist *= zonelist, int order, if (throttle_direct_reclaim(sc.gfp_mask, zonelist, nodemask)) return 1; =20 - set_task_reclaim_state(current, &sc.reclaim_state); trace_mm_vmscan_direct_reclaim_begin(order, sc.gfp_mask); =20 nr_reclaimed =3D do_try_to_free_pages(zonelist, &sc); =20 trace_mm_vmscan_direct_reclaim_end(nr_reclaimed); - set_task_reclaim_state(current, NULL); =20 return nr_reclaimed; } @@ -3347,7 +3356,6 @@ unsigned long try_to_free_mem_cgroup_pages(struct m= em_cgroup *memcg, */ struct zonelist *zonelist =3D node_zonelist(numa_node_id(), sc.gfp_mask= ); =20 - set_task_reclaim_state(current, &sc.reclaim_state); trace_mm_vmscan_memcg_reclaim_begin(0, sc.gfp_mask); noreclaim_flag =3D memalloc_noreclaim_save(); =20 @@ -3355,7 +3363,6 @@ unsigned long try_to_free_mem_cgroup_pages(struct m= em_cgroup *memcg, =20 memalloc_noreclaim_restore(noreclaim_flag); trace_mm_vmscan_memcg_reclaim_end(nr_reclaimed); - set_task_reclaim_state(current, NULL); =20 return nr_reclaimed; } @@ -4023,11 +4030,9 @@ unsigned long shrink_all_memory(unsigned long nr_t= o_reclaim) =20 fs_reclaim_acquire(sc.gfp_mask); noreclaim_flag =3D memalloc_noreclaim_save(); - set_task_reclaim_state(current, &sc.reclaim_state); =20 nr_reclaimed =3D do_try_to_free_pages(zonelist, &sc); =20 - set_task_reclaim_state(current, NULL); memalloc_noreclaim_restore(noreclaim_flag); fs_reclaim_release(sc.gfp_mask); =20 --=20 2.25.1