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From: Shiyang Ruan <ruansy.fnst@fujitsu.com>
To: <linux-kernel@vger.kernel.org>, <linux-xfs@vger.kernel.org>,
	<linux-nvdimm@lists.01.org>, <linux-mm@kvack.org>,
	<linux-fsdevel@vger.kernel.org>, <dm-devel@redhat.com>
Cc: <darrick.wong@oracle.com>, <dan.j.williams@intel.com>,
	<david@fromorbit.com>, <hch@lst.de>, <agk@redhat.com>,
	<snitzer@redhat.com>, <rgoldwyn@suse.de>
Subject: [PATCH v4 01/10] pagemap: Introduce ->memory_failure()
Date: Fri, 4 Jun 2021 09:18:35 +0800	[thread overview]
Message-ID: <20210604011844.1756145-2-ruansy.fnst@fujitsu.com> (raw)
In-Reply-To: <20210604011844.1756145-1-ruansy.fnst@fujitsu.com>

When memory-failure occurs, we call this function which is implemented
by each kind of devices.  For the fsdax case, pmem device driver
implements it.  Pmem device driver will find out the filesystem in which
the corrupted page located in.  And finally call filesystem handler to
deal with this error.

The filesystem will try to recover the corrupted data if possiable.

Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
---
 include/linux/memremap.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index 45a79da89c5f..473fe18c516a 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -87,6 +87,14 @@ struct dev_pagemap_ops {
 	 * the page back to a CPU accessible page.
 	 */
 	vm_fault_t (*migrate_to_ram)(struct vm_fault *vmf);
+
+	/*
+	 * Handle the memory failure happens on one page.  Notify the processes
+	 * who are using this page, and try to recover the data on this page
+	 * if necessary.
+	 */
+	int (*memory_failure)(struct dev_pagemap *pgmap, unsigned long pfn,
+			      int flags);
 };
 
 #define PGMAP_ALTMAP_VALID	(1 << 0)
-- 
2.31.1




  reply	other threads:[~2021-06-04  1:19 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-04  1:18 [PATCH v4 00/10] fsdax: introduce fs query to support reflink Shiyang Ruan
2021-06-04  1:18 ` Shiyang Ruan [this message]
2021-06-16  0:18   ` [PATCH v4 01/10] pagemap: Introduce ->memory_failure() Dan Williams
2021-06-04  1:18 ` [PATCH v4 02/10] dax: Introduce holder for dax_device Shiyang Ruan
2021-06-16  0:46   ` Dan Williams
2021-06-04  1:18 ` [PATCH v4 03/10] fs: Introduce ->corrupted_range() for superblock Shiyang Ruan
2021-06-16  0:48   ` Dan Williams
2021-06-17  6:51     ` ruansy.fnst
2021-06-17  7:04       ` Dan Williams
2021-06-17  8:12         ` ruansy.fnst
2021-06-04  1:18 ` [PATCH v4 04/10] mm, fsdax: Refactor memory-failure handler for dax mapping Shiyang Ruan
2021-06-16  6:30   ` Dan Williams
2021-06-17  7:51     ` ruansy.fnst
2021-06-04  1:18 ` [PATCH v4 05/10] mm, pmem: Implement ->memory_failure() in pmem driver Shiyang Ruan
2021-06-16  6:49   ` Dan Williams
2021-06-04  1:18 ` [PATCH v4 06/10] fs/dax: Implement dax_holder_operations Shiyang Ruan
2021-06-04  1:18 ` [PATCH v4 07/10] dm: Introduce ->rmap() to find bdev offset Shiyang Ruan
2021-06-04  1:18 ` [PATCH v4 08/10] md: Implement dax_holder_operations Shiyang Ruan
2021-06-04  5:48   ` kernel test robot
2021-06-04  1:18 ` [PATCH v4 09/10] xfs: Implement ->corrupted_range() for XFS Shiyang Ruan
2021-06-04  5:22   ` kernel test robot
2021-06-04  5:40   ` kernel test robot
2021-06-04  1:18 ` [PATCH v4 10/10] fs/dax: Remove useless functions Shiyang Ruan

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