From: Dan Williams <dan.j.williams@intel.com> To: linux-nvdimm@lists.01.org Cc: Jan Kara <jack@suse.cz>, Matthew Wilcox <mawilcox@microsoft.com>, x86@kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org, hch@lst.de Subject: [PATCH v4 06/16] filesystem-dax: convert to dax_flush() Date: Thu, 29 Jun 2017 10:53:29 -0700 [thread overview] Message-ID: <149875880940.10031.11442019937386170339.stgit@dwillia2-desk3.amr.corp.intel.com> (raw) In-Reply-To: <149875877608.10031.17813337234536358002.stgit@dwillia2-desk3.amr.corp.intel.com> Filesystem-DAX flushes caches whenever it writes to the address returned through dax_direct_access() and when writing back dirty radix entries. That flushing is only required in the pmem case, so the dax_flush() helper skips cache management work when the underlying driver does not specify a flush method. We still do all the dirty tracking since the radix entry will already be there for locking purposes. However, the work to clean the entry will be a nop for some dax drivers. Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- fs/dax.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/dax.c b/fs/dax.c index b459948de427..0933fc460ada 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -784,7 +784,7 @@ static int dax_writeback_one(struct block_device *bdev, } dax_mapping_entry_mkclean(mapping, index, pfn_t_to_pfn(pfn)); - wb_cache_pmem(kaddr, size); + dax_flush(dax_dev, pgoff, kaddr, size); /* * After we have flushed the cache, we can clear the dirty tag. There * cannot be new dirty data in the pfn after the flush has completed as _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm
WARNING: multiple messages have this Message-ID (diff)
From: Dan Williams <dan.j.williams@intel.com> To: linux-nvdimm@lists.01.org Cc: Jan Kara <jack@suse.cz>, Matthew Wilcox <mawilcox@microsoft.com>, x86@kernel.org, linux-kernel@vger.kernel.org, Jeff Moyer <jmoyer@redhat.com>, viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org, Ross Zwisler <ross.zwisler@linux.intel.com>, hch@lst.de Subject: [PATCH v4 06/16] filesystem-dax: convert to dax_flush() Date: Thu, 29 Jun 2017 10:53:29 -0700 [thread overview] Message-ID: <149875880940.10031.11442019937386170339.stgit@dwillia2-desk3.amr.corp.intel.com> (raw) In-Reply-To: <149875877608.10031.17813337234536358002.stgit@dwillia2-desk3.amr.corp.intel.com> Filesystem-DAX flushes caches whenever it writes to the address returned through dax_direct_access() and when writing back dirty radix entries. That flushing is only required in the pmem case, so the dax_flush() helper skips cache management work when the underlying driver does not specify a flush method. We still do all the dirty tracking since the radix entry will already be there for locking purposes. However, the work to clean the entry will be a nop for some dax drivers. Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- fs/dax.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/dax.c b/fs/dax.c index b459948de427..0933fc460ada 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -784,7 +784,7 @@ static int dax_writeback_one(struct block_device *bdev, } dax_mapping_entry_mkclean(mapping, index, pfn_t_to_pfn(pfn)); - wb_cache_pmem(kaddr, size); + dax_flush(dax_dev, pgoff, kaddr, size); /* * After we have flushed the cache, we can clear the dirty tag. There * cannot be new dirty data in the pfn after the flush has completed as
next prev parent reply other threads:[~2017-06-29 17:58 UTC|newest] Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-06-29 17:52 [PATCH v4 00/16] pmem: stop abusing copy_user_nocache(), and other reworks Dan Williams 2017-06-29 17:52 ` Dan Williams 2017-06-29 17:53 ` [PATCH v4 01/16] x86, uaccess: introduce copy_from_iter_flushcache for pmem / cache-bypass operations Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:53 ` [PATCH v4 02/16] dm: add ->copy_from_iter() dax operation support Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:53 ` [PATCH v4 03/16] filesystem-dax: convert to dax_copy_from_iter() Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:53 ` [PATCH v4 04/16] dax, pmem: introduce an optional 'flush' dax_operation Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:53 ` [PATCH v4 05/16] dm: add ->flush() dax operation support Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:53 ` Dan Williams [this message] 2017-06-29 17:53 ` [PATCH v4 06/16] filesystem-dax: convert to dax_flush() Dan Williams 2017-06-29 17:53 ` [PATCH v4 07/16] x86, dax: replace clear_pmem() with open coded memset + dax_ops->flush Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:53 ` [PATCH v4 08/16] x86, dax, libnvdimm: remove wb_cache_pmem() indirection Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:53 ` [PATCH v4 09/16] x86, libnvdimm, pmem: move arch_invalidate_pmem() to libnvdimm Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:53 ` [PATCH v4 10/16] x86, libnvdimm, pmem: remove global pmem api Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:53 ` [PATCH v4 11/16] libnvdimm, pmem: fix persistence warning Dan Williams 2017-06-29 17:53 ` Dan Williams 2017-06-29 17:54 ` [PATCH v4 12/16] libnvdimm, nfit: enable support for volatile ranges Dan Williams 2017-06-29 17:54 ` Dan Williams 2017-06-29 19:20 ` Linda Knippers 2017-06-29 19:20 ` Linda Knippers 2017-06-29 20:42 ` Dan Williams 2017-06-29 20:42 ` Dan Williams 2017-06-29 21:16 ` Linda Knippers 2017-06-29 21:16 ` Linda Knippers 2017-06-29 21:50 ` Dan Williams 2017-06-29 21:50 ` Dan Williams 2017-06-29 22:12 ` Linda Knippers 2017-06-29 22:12 ` Linda Knippers 2017-06-29 22:28 ` Dan Williams 2017-06-29 22:28 ` Dan Williams 2017-06-29 22:35 ` Linda Knippers 2017-06-29 22:35 ` Linda Knippers 2017-06-29 22:43 ` Dan Williams 2017-06-29 22:43 ` Dan Williams 2017-06-29 22:49 ` Linda Knippers 2017-06-29 22:49 ` Linda Knippers 2017-06-29 22:58 ` Dan Williams 2017-06-29 22:58 ` Dan Williams 2017-06-29 23:14 ` Linda Knippers 2017-06-29 23:14 ` Linda Knippers 2017-06-30 1:28 ` Dan Williams 2017-06-30 1:28 ` Dan Williams 2017-07-05 23:46 ` Kani, Toshimitsu 2017-07-05 23:46 ` Kani, Toshimitsu 2017-07-06 0:07 ` Dan Williams 2017-07-06 0:07 ` Dan Williams 2017-07-06 1:17 ` Kani, Toshimitsu 2017-07-06 1:17 ` Kani, Toshimitsu 2017-07-06 2:08 ` Dan Williams 2017-07-06 2:08 ` Dan Williams 2017-07-06 2:11 ` hch 2017-07-06 2:11 ` hch 2017-07-06 2:53 ` Oliver 2017-07-06 2:53 ` Oliver 2017-07-06 2:56 ` hch 2017-07-06 2:56 ` hch 2017-06-29 17:54 ` [PATCH v4 13/16] dax: remove default copy_from_iter fallback Dan Williams 2017-06-29 17:54 ` Dan Williams 2017-06-29 17:54 ` [PATCH v4 14/16] dax: convert to bitmask for flags Dan Williams 2017-06-29 17:54 ` Dan Williams 2017-06-29 17:54 ` [PATCH v4 15/16] libnvdimm, pmem, dax: export a cache control attribute Dan Williams 2017-06-29 17:54 ` Dan Williams 2017-06-29 17:54 ` [PATCH v4 16/16] libnvdimm, pmem: disable dax flushing when pmem is fronting a volatile region Dan Williams 2017-06-29 17:54 ` Dan Williams
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