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From: Shiyang Ruan <ruansy.fnst@fujitsu.com>
To: <linux-kernel@vger.kernel.org>, <linux-xfs@vger.kernel.org>,
	<nvdimm@lists.linux.dev>, <linux-mm@kvack.org>,
	<linux-fsdevel@vger.kernel.org>, <dm-devel@redhat.com>
Cc: <djwong@kernel.org>, <dan.j.williams@intel.com>,
	<david@fromorbit.com>, <hch@lst.de>, <agk@redhat.com>,
	<snitzer@redhat.com>
Subject: [PATCH RESEND v6 4/9] pmem,mm: Implement ->memory_failure in pmem driver
Date: Fri, 30 Jul 2021 18:01:53 +0800	[thread overview]
Message-ID: <20210730100158.3117319-5-ruansy.fnst@fujitsu.com> (raw)
In-Reply-To: <20210730100158.3117319-1-ruansy.fnst@fujitsu.com>

With dax_holder notify support, we are able to notify the memory failure
from pmem driver to upper layers.  If there is something not support in
the notify routine, memory_failure will fall back to the generic hanlder.

Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
---
 drivers/nvdimm/pmem.c | 13 +++++++++++++
 mm/memory-failure.c   | 14 ++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 1e0615b8565e..fea4ffc333b8 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -362,9 +362,22 @@ static void pmem_release_disk(void *__pmem)
 	del_gendisk(pmem->disk);
 }
 
+static int pmem_pagemap_memory_failure(struct dev_pagemap *pgmap,
+		unsigned long pfn, unsigned long nr_pfns, int flags)
+{
+	struct pmem_device *pmem =
+			container_of(pgmap, struct pmem_device, pgmap);
+	loff_t offset = PFN_PHYS(pfn) - pmem->phys_addr - pmem->data_offset;
+
+	return dax_holder_notify_failure(pmem->dax_dev, offset,
+					 page_size(pfn_to_page(pfn)) * nr_pfns,
+					 &flags);
+}
+
 static const struct dev_pagemap_ops fsdax_pagemap_ops = {
 	.kill			= pmem_pagemap_kill,
 	.cleanup		= pmem_pagemap_cleanup,
+	.memory_failure		= pmem_pagemap_memory_failure,
 };
 
 static int pmem_attach_disk(struct device *dev,
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 3bdfcb45f66e..ab3eda335acd 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1600,6 +1600,20 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags,
 	 */
 	SetPageHWPoison(page);
 
+	/*
+	 * Call driver's implementation to handle the memory failure, otherwise
+	 * fall back to generic handler.
+	 */
+	if (pgmap->ops->memory_failure) {
+		rc = pgmap->ops->memory_failure(pgmap, pfn, 1, flags);
+		/*
+		 * Fall back to generic handler too if operation is not
+		 * supported inside the driver/device/filesystem.
+		 */
+		if (rc != EOPNOTSUPP)
+			goto out;
+	}
+
 	mf_generic_kill_procs(pfn, flags);
 out:
 	/* drop pgmap ref acquired in caller */
-- 
2.32.0





  parent reply	other threads:[~2021-07-30 10:02 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-30 10:01 [PATCH RESEND v6 0/9] fsdax: introduce fs query to support reflink Shiyang Ruan
2021-07-30 10:01 ` [PATCH RESEND v6 1/9] pagemap: Introduce ->memory_failure() Shiyang Ruan
2021-08-06  1:17   ` Jane Chu
2021-08-16 17:20     ` Jane Chu
2021-08-17  1:44       ` ruansy.fnst
2021-08-18  5:43       ` Jane Chu
2021-08-18  6:08         ` Jane Chu
2021-08-18  7:52           ` ruansy.fnst
2021-08-18 17:10             ` Dan Williams
2021-08-23 13:21               ` hch
2021-08-18 15:52           ` Darrick J. Wong
2021-08-19  7:18           ` Jane Chu
2021-08-19  8:11             ` Jane Chu
2021-08-19  9:10               ` ruansy.fnst
2021-08-19 20:50                 ` Jane Chu
2021-08-20 16:07   ` Dan Williams
2021-07-30 10:01 ` [PATCH RESEND v6 2/9] dax: Introduce holder for dax_device Shiyang Ruan
2021-08-06  1:02   ` Jane Chu
2021-08-17  1:45     ` ruansy.fnst
2021-08-20 16:06   ` Dan Williams
2021-08-20 20:19   ` Dan Williams
2021-07-30 10:01 ` [PATCH RESEND v6 3/9] mm: factor helpers for memory_failure_dev_pagemap Shiyang Ruan
2021-08-06  1:00   ` Jane Chu
2021-08-20 16:54     ` Dan Williams
2021-07-30 10:01 ` Shiyang Ruan [this message]
2021-08-20 20:51   ` [PATCH RESEND v6 4/9] pmem,mm: Implement ->memory_failure in pmem driver Dan Williams
2021-07-30 10:01 ` [PATCH RESEND v6 5/9] mm: Introduce mf_dax_kill_procs() for fsdax case Shiyang Ruan
2021-08-06  0:59   ` Jane Chu
2021-08-20 22:40   ` Dan Williams
2021-07-30 10:01 ` [PATCH RESEND v6 6/9] xfs: Implement ->notify_failure() for XFS Shiyang Ruan
2021-08-06  0:50   ` Jane Chu
2021-08-20 22:56     ` Dan Williams
2021-08-20 22:59   ` Dan Williams
2021-07-30 10:01 ` [PATCH RESEND v6 7/9] dm: Introduce ->rmap() to find bdev offset Shiyang Ruan
2021-08-20 23:46   ` Dan Williams
2021-07-30 10:01 ` [PATCH RESEND v6 8/9] md: Implement dax_holder_operations Shiyang Ruan
2021-08-06  0:48   ` Jane Chu
2021-08-17  1:59     ` ruansy.fnst
2021-07-30 10:01 ` [PATCH RESEND v6 9/9] fsdax: add exception for reflinked files Shiyang Ruan
2021-08-06  0:46   ` Jane Chu

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