As suggested by Dave Chinner:
As I say to all these sorts of one-off test prgrams: please add the
new MAP_SYNC flag to xfs_io rather than writing a one-off
test program to set it and write some data.
And if we're going to be adding special custom tests just because
we need to insert dm-log marks, add that functionality to xfs_io,
too.
That way we can create complex custom dm logwrite tests without
needing one-off test programs for them all...
This series enhances xfs_io by adding support for the MAP_SYNC mmap() flag
and for dm-log-writes marks. This allows the resulting xfstest for
MAP_SYNC to be much simpler and have no custom C programs.
You can find an xfsprogs branch with this series here:
https://git.kernel.org/pub/scm/linux/kernel/git/zwisler/xfsprogs-dev.git/log/?h=map_sync
Both MAP_SYNC and the DAX enhancements for dm-log-writes will be found in
the upcoming v4.15-rc1. For ease of testing I've posted a kernel that is
v4.14 plus just those two patch series here:
https://git.kernel.org/pub/scm/linux/kernel/git/zwisler/linux.git/log/?h=map_sync_dm_log_writes
Ross Zwisler (2):
xfs_io: add MAP_SYNC support to mmap()
xfs_io: add a new 'log_writes' command
configure.ac | 1 +
include/builddefs.in | 1 +
include/linux.h | 5 ++++
io/Makefile | 5 ++--
io/init.c | 1 +
io/io.h | 2 ++
io/log_writes.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++
io/mmap.c | 19 +++++++++----
m4/package_libcdev.m4 | 16 +++++++++++
man/man8/xfs_io.8 | 25 ++++++++++++++++-
10 files changed, 145 insertions(+), 8 deletions(-)
create mode 100644 io/log_writes.c
--
2.9.5
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