fuse2fs: work around EBUSY discard returns from dm-thinp
generic/500 has this interesting failure mode when fuse2fs is running in
fuseblk mode:
--- /run/fstests/bin/tests/generic/500.out 2025-07-15 14:45:15.092576090 -0700
+++ /var/tmp/fstests/generic/500.out.bad 2025-09-05 15:09:35.211499883 -0700
@@ -1,2 +1,22 @@
QA output created by 500
+fstrim: /opt: FITRIM ioctl failed: Device or resource busy
Apparently you can overwhelm dm-thinp with a large number of discard
requests, at which point it starts returning EBUSY. This is unexpected
behavior but let's mask that off because discard is advisory anyways.
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
1 file changed
