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Groups > linux.kernel > #1385713
| Path | csiph.com!aioe.org!bofh.it!news.nic.it!robomod |
|---|---|
| From | Vishal Verma <vishal.l.verma@intel.com> |
| Newsgroups | linux.kernel |
| Subject | [PATCH v3 2/7] dax: fallback from pmd to pte on error |
| Date | Sat, 23 Apr 2016 21:20:02 +0200 |
| Message-ID | <rrbfY-8dY-19@gated-at.bofh.it> (permalink) |
| References | <rrbfY-8dY-3@gated-at.bofh.it> |
| X-Original-To | linux-nvdimm@lists.01.org |
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| X-Mailer | git-send-email 2.5.5 |
| Sender | robomod@news.nic.it |
| List-ID | <linux-kernel.vger.kernel.org> |
| X-Mailing-List | linux-kernel@vger.kernel.org |
| Approved | robomod@news.nic.it |
| Lines | 29 |
| Organization | linux.* mail to news gateway |
| X-Original-Cc | Dan Williams <dan.j.williams@intel.com>, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, xfs@oss.sgi.com, linux-ext4@vger.kernel.org, linux-mm@kvack.org, Matthew Wilcox <matthew.r.wilcox@intel.com>, Ross Zwisler <ross.zwisler@linux.intel.com>, Dave Chinner <david@fromorbit.com>, Jan Kara <jack@suse.cz>, Jens Axboe <axboe@fb.com>, Al Viro <viro@zeniv.linux.org.uk>, Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org, Christoph Hellwig <hch@infradead.org>, Jeff Moyer <jmoyer@redhat.com>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> |
| X-Original-Date | Sat, 23 Apr 2016 13:13:37 -0600 |
| X-Original-Message-ID | <1461438822-3592-3-git-send-email-vishal.l.verma@intel.com> |
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| X-Original-Sender | linux-kernel-owner@vger.kernel.org |
| Xref | csiph.com linux.kernel:1385713 |
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From: Dan Williams <dan.j.williams@intel.com>
In preparation for consulting a badblocks list in pmem_direct_access(),
teach dax_pmd_fault() to fallback rather than fail immediately upon
encountering an error. The thought being that reducing the span of the
dax request may avoid the error region.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
fs/dax.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/dax.c b/fs/dax.c
index 5a34f08..52f0044 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1111,8 +1111,8 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address,
long length = dax_map_atomic(bdev, &dax);
if (length < 0) {
- result = VM_FAULT_SIGBUS;
- goto out;
+ dax_pmd_dbg(&bh, address, "dax-error fallback");
+ goto fallback;
}
if (length < PMD_SIZE) {
dax_pmd_dbg(&bh, address, "dax-length too small");
--
2.5.5
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[PATCH v3 0/7] dax: handling media errors Vishal Verma <vishal.l.verma@intel.com> - 2016-04-23 21:20 +0200 [PATCH v3 7/7] dax: fix a comment in dax_zero_page_range and dax_truncate_page Vishal Verma <vishal.l.verma@intel.com> - 2016-04-23 21:20 +0200 [PATCH v3 4/7] dax: use sb_issue_zerout instead of calling dax_clear_sectors Vishal Verma <vishal.l.verma@intel.com> - 2016-04-23 21:20 +0200 [PATCH v3 1/7] block, dax: pass blk_dax_ctl through to drivers Vishal Verma <vishal.l.verma@intel.com> - 2016-04-23 21:20 +0200 [PATCH v3 2/7] dax: fallback from pmd to pte on error Vishal Verma <vishal.l.verma@intel.com> - 2016-04-23 21:20 +0200 [PATCH v3 6/7] dax: for truncate/hole-punch, do zeroing through the driver if possible Vishal Verma <vishal.l.verma@intel.com> - 2016-04-23 21:20 +0200 [PATCH v3 5/7] dax: handle media errors in dax_do_io Vishal Verma <vishal.l.verma@intel.com> - 2016-04-23 21:20 +0200
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