diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2023-11-13 09:08:39 -0800 |
|---|---|---|
| committer | Zorro Lang <zlang@kernel.org> | 2023-11-16 15:37:54 +0800 |
| commit | 848c6a882a6faab9d2545a26ad5070a62f7a7bd1 (patch) | |
| tree | 83a3b52336e8ef97ec16ad32563a1951d6fadc3e /m4 | |
| parent | 59372e8d3f961eb20d911e715777af06de921891 (diff) | |
generic: test reads racing with slow reflink operations
XFS has a rather slow reflink operation. While a reflink operation is
running, other programs cannot read the contents of the source file,
which is causing latency spikes. Catherine Hoang wrote a patch to
permit reads, since the source file contents do not change. This is a
functionality test for that patch.
[zlang@ adds `_supported_fs generic`]
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Catherine Hoang <catherine.hoang@oracle.com>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/package_libcdev.m4 | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/m4/package_libcdev.m4 b/m4/package_libcdev.m4 index 7f731044..0f4b8063 100644 --- a/m4/package_libcdev.m4 +++ b/m4/package_libcdev.m4 @@ -174,3 +174,16 @@ AC_DEFUN([AC_HAVE_FIEXCHANGE], AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)]) AC_SUBST(have_fiexchange) ]) + +# Check if we have FICLONE +AC_DEFUN([AC_HAVE_FICLONE], + [ AC_MSG_CHECKING([for FICLONE]) + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include <sys/ioctl.h> +#include <linux/fs.h> + ]], [[ + ioctl(-1, FICLONE, -1); + ]])],[have_ficlone=yes + AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)]) + AC_SUBST(have_ficlone) + ]) |