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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Chao Yu <yuchao0@huawei.com>, Jaegeuk Kim <jaegeuk@kernel.org>,
	Sasha Levin <sashal@kernel.org>,
	linux-f2fs-devel@lists.sourceforge.net
Subject: [PATCH AUTOSEL 5.7 04/24] f2fs: fix to check page dirty status before writeback
Date: Wed, 19 Aug 2020 20:01:35 -0400	[thread overview]
Message-ID: <20200820000155.215089-4-sashal@kernel.org> (raw)
In-Reply-To: <20200820000155.215089-1-sashal@kernel.org>

From: Chao Yu <yuchao0@huawei.com>

[ Upstream commit eb1353cfa9c1e9415b03dc117f8399969fa02102 ]

In f2fs_write_raw_pages(), we need to check page dirty status before
writeback, because there could be a racer (e.g. reclaimer) helps
writebacking the dirty page.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/f2fs/compress.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index a5b2e72174bb1..a1504a7aecb19 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -1207,6 +1207,12 @@ static int f2fs_write_raw_pages(struct compress_ctx *cc,
 				congestion_wait(BLK_RW_ASYNC,
 						DEFAULT_IO_TIMEOUT);
 				lock_page(cc->rpages[i]);
+
+				if (!PageDirty(cc->rpages[i])) {
+					unlock_page(cc->rpages[i]);
+					continue;
+				}
+
 				clear_page_dirty_for_io(cc->rpages[i]);
 				goto retry_write;
 			}
-- 
2.25.1


  parent reply	other threads:[~2020-08-20  0:11 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-20  0:01 [PATCH AUTOSEL 5.7 01/24] scsi: ufs: Add DELAY_BEFORE_LPM quirk for Micron devices Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 02/24] scsi: target: tcmu: Fix crash in tcmu_flush_dcache_range on ARM Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 03/24] media: budget-core: Improve exception handling in budget_register() Sasha Levin
2020-08-20  0:01 ` Sasha Levin [this message]
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 05/24] rtc: goldfish: Enable interrupt in set_alarm() when necessary Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 06/24] media: vpss: clean up resources in init Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 07/24] Input: psmouse - add a newline when printing 'proto' by sysfs Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 08/24] MIPS: Fix unable to reserve memory for Crash kernel Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 09/24] m68knommu: fix overwriting of bits in ColdFire V3 cache control Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 10/24] svcrdma: Fix another Receive buffer leak Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 11/24] xfs: fix inode quota reservation checks Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 12/24] drm/ttm: fix offset in VMAs with a pg_offs in ttm_bo_vm_access Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 13/24] riscv: Fixup static_obj() fail Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 14/24] jffs2: fix UAF problem Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 15/24] ceph: fix use-after-free for fsc->mdsc Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 16/24] swiotlb-xen: use vmalloc_to_page on vmalloc virt addresses Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 17/24] cpufreq: intel_pstate: Fix cpuinfo_max_freq when MSR_TURBO_RATIO_LIMIT is 0 Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 18/24] scsi: libfc: Free skb in fc_disc_gpn_id_resp() for valid cases Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 19/24] virtio_ring: Avoid loop when vq is broken in virtqueue_poll Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 20/24] media: camss: fix memory leaks on error handling paths in probe Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 21/24] tools/testing/selftests/cgroup/cgroup_util.c: cg_read_strcmp: fix null pointer dereference Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 22/24] xfs: Fix UBSAN null-ptr-deref in xfs_sysfs_init Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 23/24] alpha: fix annotation of io{read,write}{16,32}be() Sasha Levin
2020-08-20  0:01 ` [PATCH AUTOSEL 5.7 24/24] fs/signalfd.c: fix inconsistent return codes for signalfd4 Sasha Levin

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