On 3/20/24 21:16, Josef Bacik wrote:
Btrfs had a deadlock that you could trigger by mmap'ing a large file and using that as the buffer for fiemap. This test adds a c program to do this, and the fstest creates a large enough file and then runs the reproducer on the file. Without the fix btrfs deadlocks, with the fix we pass fine. Signed-off-by: Josef Bacik <josef@xxxxxxxxxxxxxx> --- v3->v4: - Rework this to use punch-alternating to generate a fragmented file. - Rework the _require's to reflect the new mode of fragmenting a file.
+# real QA test starts here +_supported_fs generic +_require_test +_require_test_program "fiemap-fault" +_require_test_program "punch-alternating" +_require_xfs_io_command "fpunch" + +dst=$TEST_DIR/$seq/fiemap-fault + +mkdir -p $TEST_DIR/$seq + +echo "Silence is golden" + +# Generate a file with lots of extents +blksz=$(_get_file_block_size $TEST_DIR) +$XFS_IO_PROG -f -c "pwrite -q 0 $((blksz * 10000))" $dst +$here/src/punch-alternating $dst + +# Now run the reproducer +$here/src/fiemap-fault $dst + +# success, all done +status=$? +exit
Reviewed-by: Anand Jain <anand.jain@xxxxxxxxxx>
+
A whitespace here, to be addressed during integration. Thanks, Anand
diff --git a/tests/generic/808.out b/tests/generic/808.out new file mode 100644 index 00000000..88253428 --- /dev/null +++ b/tests/generic/808.out @@ -0,0 +1,2 @@ +QA output created by 808 +Silence is golden
