From: Jane Chu <jane.chu@oracle.com>
To: dan.j.williams@intel.com, vishal.l.verma@intel.com,
dave.jiang@intel.com, ira.weiny@intel.com,
viro@zeniv.linux.org.uk, willy@infradead.org, jack@suse.cz,
nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: [PATCH 2/3] dax: introduce dax_clear_poison to dax pwrite operation
Date: Tue, 14 Sep 2021 17:31:30 -0600 [thread overview]
Message-ID: <20210914233132.3680546-3-jane.chu@oracle.com> (raw)
In-Reply-To: <20210914233132.3680546-1-jane.chu@oracle.com>
When pwrite(2) encounters poison in a dax range, it fails with EIO.
But if the backend hardware of the dax device is capable of clearing
poison, try that and resume the write.
Signed-off-by: Jane Chu <jane.chu@oracle.com>
---
fs/dax.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/fs/dax.c b/fs/dax.c
index 99b4e78d888f..592a156abbf2 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1156,8 +1156,17 @@ dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
if (ret)
break;
+ /*
+ * If WRITE operation encounters media error in a page aligned
+ * range, try to clear the error, then resume, for just once.
+ */
map_len = dax_direct_access(dax_dev, pgoff, PHYS_PFN(size),
&kaddr, NULL);
+ if ((map_len == -EIO) && (iov_iter_rw(iter) == WRITE)) {
+ if (dax_clear_poison(dax_dev, pgoff, PHYS_PFN(size)) == 0)
+ map_len = dax_direct_access(dax_dev, pgoff,
+ PHYS_PFN(size), &kaddr, NULL);
+ }
if (map_len < 0) {
ret = map_len;
break;
--
2.18.4
next prev parent reply other threads:[~2021-09-14 23:32 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-14 23:31 [PATCH 0/3] dax: clear poison on the fly along pwrite Jane Chu
2021-09-14 23:31 ` [PATCH 1/3] dax: introduce dax_operation dax_clear_poison Jane Chu
2021-11-04 17:53 ` Christoph Hellwig
2021-09-14 23:31 ` Jane Chu [this message]
2021-11-04 17:53 ` [PATCH 2/3] dax: introduce dax_clear_poison to dax pwrite operation Christoph Hellwig
2021-09-14 23:31 ` [PATCH 2/3] dax: introduce dax clear poison to page aligned " Jane Chu
2021-09-14 23:31 ` [PATCH 3/3] libnvdimm/pmem: Provide pmem_dax_clear_poison for dax operation Jane Chu
2021-11-04 17:55 ` Christoph Hellwig
2021-11-04 20:27 ` Jane Chu
2021-09-15 4:44 ` [PATCH 0/3] dax: clear poison on the fly along pwrite Dan Williams
2021-09-15 7:22 ` Jane Chu
2021-09-15 16:15 ` Darrick J. Wong
2021-09-15 20:27 ` Dan Williams
2021-09-16 0:05 ` Darrick J. Wong
2021-09-16 7:11 ` Christoph Hellwig
2021-09-16 18:40 ` Dan Williams
2021-09-17 12:53 ` Christoph Hellwig
2021-09-17 15:27 ` Darrick J. Wong
2021-09-17 20:21 ` Dan Williams
2021-09-18 0:07 ` Darrick J. Wong
2021-09-17 19:37 ` Dan Williams
2021-09-23 20:48 ` Jane Chu
2021-09-23 20:55 ` Jane Chu
2021-09-23 21:42 ` Dan Williams
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