| Message ID | 20161117181412.GA21816@vader.DHCP.thefacebook.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Thu, Nov 17, 2016 at 10:14:12AM -0800, Omar Sandoval wrote: > On Thu, Nov 17, 2016 at 01:26:11PM +0800, Eryu Guan wrote: > > On Wed, Nov 16, 2016 at 04:29:34PM -0800, Omar Sandoval wrote: > > > From: Omar Sandoval <osandov@fb.com> > > > > > > There have been a couple of logic bugs in `btrfs_get_extent()` which > > > could lead to spurious -EEXIST errors from read or write. This test > > > exercises those conditions by having two threads race to add an extent > > > to the extent map. > > > > > > This is fixed by Linux commit 8dff9c853410 ("Btrfs: deal with duplciates > > > during extent_map insertion in btrfs_get_extent") and the patch "Btrfs: > > > deal with existing encompassing extent map in btrfs_get_extent()" > > > (http://marc.info/?l=linux-btrfs&m=147873402311143&w=2). > > > > > > Although the bug is Btrfs-specific, nothing about the test is. > > > > > > Signed-off-by: Omar Sandoval <osandov@fb.com> > > > --- > > [snip] > > > +# real QA test starts here > > > + > > > +_supported_fs generic > > > +_supported_os Linux > > > +_require_test > > > +_require_xfs_io_command "falloc" > > > +_require_test_program "dio-interleaved" > > > + > > > +extent_size="$(($(stat -f -c '%S' "$TEST_DIR") * 2))" > > > > There's a helper to get fs block size: "get_block_size". > > > > > +num_extents=1024 > > > +testfile="$TEST_DIR/$$-testfile" > > > + > > > +truncate -s 0 "$testfile" > > > > I prefer using xfs_io to do the truncate, > > > > $XFS_IO_PROG -fc "truncate 0" "$testfile" > > > > Because in rare cases truncate(1) may be unavailable, e.g. RHEL5, > > usually it's not a big issue, but xfs_io works all the time, we have a > > better way, so why not :) > > > > > +for ((off = 0; off < num_extents * extent_size; off += extent_size)); do > > > + xfs_io -c "falloc $off $extent_size" "$testfile" > > > > Use $XFS_IO_PROG not bare xfs_io. > > > > I can fix all the tiny issues at commit time. > > > > Thanks, > > Eryu > > Thank you, Eryu, that's all okay with me. I also had a typo here: > > diff --git a/src/dio-interleaved.c b/src/dio-interleaved.c > index 831a191..6b04c99 100644 > --- a/src/dio-interleaved.c > +++ b/src/dio-interleaved.c > @@ -58,7 +58,7 @@ int main(int argc, char **argv) > int fd; > > if (argc != 4) { > - fprintf(stderr, "usage: %s SECTORSIZE NUM_EXTENTS PATH\n", > + fprintf(stderr, "usage: %s EXTENT_SIZE NUM_EXTENTS PATH\n", > argv[0]); > return EXIT_FAILURE; > } > > > Feel free to fix this at commit time, too, or I can send a v2 if you > prefer. Thanks! I'll fix them all. Eryu -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/src/dio-interleaved.c b/src/dio-interleaved.c index 831a191..6b04c99 100644 --- a/src/dio-interleaved.c +++ b/src/dio-interleaved.c @@ -58,7 +58,7 @@ int main(int argc, char **argv) int fd; if (argc != 4) { - fprintf(stderr, "usage: %s SECTORSIZE NUM_EXTENTS PATH\n", + fprintf(stderr, "usage: %s EXTENT_SIZE NUM_EXTENTS PATH\n", argv[0]); return EXIT_FAILURE; }