https://github.com/torvalds/linux
Revision 1eb643d02b21412e603b42cdd96010a2ac31c05f authored by Jan Kara on 23 June 2017, 22:08:46 UTC, committed by Linus Torvalds on 23 June 2017, 23:15:55 UTC
dax_writeback_mapping_range() fails to update iteration index when
searching radix tree for entries needing cache flushing. Thus each
pagevec worth of entries is searched starting from the start which is
inefficient and prone to livelocks. Update index properly.
Link: http://lkml.kernel.org/r/20170619124531.21491-1-jack@suse.cz
Fixes: 9973c98ecfda3 ("dax: add support for fsync/sync")
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Tip revision: 1eb643d02b21412e603b42cdd96010a2ac31c05f authored by Jan Kara on 23 June 2017, 22:08:46 UTC
fs/dax.c: fix inefficiency in dax_writeback_mapping_range()
fs/dax.c: fix inefficiency in dax_writeback_mapping_range()
Tip revision: 1eb643d
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| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.3 KB |
| .mailmap | -rw-r--r-- | 8.1 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 96.2 KB |
| Kbuild | -rw-r--r-- | 2.2 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 397.7 KB |
| Makefile | -rw-r--r-- | 58.6 KB |
| README | -rw-r--r-- | 722 bytes |
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