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Fri, 30 Jul 2021 18:02:10 +0800 From: Shiyang Ruan To: , , , , , Date: Fri, 30 Jul 2021 18:01:53 +0800 Message-ID: <20210730100158.3117319-5-ruansy.fnst@fujitsu.com> In-Reply-To: <20210730100158.3117319-1-ruansy.fnst@fujitsu.com> References: <20210730100158.3117319-1-ruansy.fnst@fujitsu.com> MIME-Version: 1.0 X-yoursite-MailScanner-ID: 39DD64D0D4A2.A1089 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@fujitsu.com X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-loop: dm-devel@redhat.com X-Mailman-Approved-At: Fri, 30 Jul 2021 09:53:42 -0400 Cc: snitzer@redhat.com, djwong@kernel.org, david@fromorbit.com, dan.j.williams@intel.com, hch@lst.de, agk@redhat.com Subject: [dm-devel] [PATCH RESEND v6 4/9] pmem, mm: Implement ->memory_failure in pmem driver X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.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 --- 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 */