Matthew Wilcox (Oracle) 14284fedf5 iomap: Mark read blocks uptodate in write_begin ...

When bringing (portions of) a page uptodate, we were marking blocks that
were zeroed as being uptodate, but not blocks that were read from storage.

Like the previous commit, this problem was found with generic/127 and
a kernel which failed readahead I/Os.  This bug causes writes to be
silently lost when working with flaky storage.

Fixes: 9dc55f1389f9 ("iomap: add support for sub-pagesize buffered I/O without buffer heads")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

2020-09-10 08:26:18 -07:00

..

apply.c

iomap: Make sure iomap_end is called after iomap_begin

2020-07-06 10:49:27 -07:00

buffered-io.c

iomap: Mark read blocks uptodate in write_begin

2020-09-10 08:26:18 -07:00

direct-io.c

iomap: Fix direct I/O write consistency check

2020-09-10 08:26:16 -07:00

fiemap.c

fs: handle FIEMAP_FLAG_SYNC in fiemap_prep

2020-06-03 23:16:55 -04:00

Makefile

iomap: lift common tracing code from xfs to iomap

2019-10-21 08:51:59 -07:00

seek.c

treewide: Use fallthrough pseudo-keyword

2020-08-23 17:36:59 -05:00

swapfile.c

iomap: use a srcmap for a read-modify-write I/O

2019-10-21 08:51:59 -07:00

trace.c

iomap: lift common tracing code from xfs to iomap

2019-10-21 08:51:59 -07:00

trace.h

iomap: fall back to buffered writes for invalidation failures

2020-08-05 09:24:16 -07:00