Fix ztest deadman panic with indirect vdev damage

[mirror_zfs.git] / cmd / ztest / ztest.c

diff --git a/cmd/ztest/ztest.c b/cmd/ztest/ztest.c
index 44d4e97403f40740421b4a7307d28ff4f0ad8e85..983bc0dfe03685ee7385202e49225f69cd48dbad 100644 (file)
--- a/cmd/ztest/ztest.c
+++ b/cmd/ztest/ztest.c
@@ -7383,8 +7383,13 @@ main(int argc, char **argv)
         * Verify that even extensively damaged split blocks with many
         * segments can be reconstructed in a reasonable amount of time
         * when reconstruction is known to be possible.
+        *
+        * Note: the lower this value is, the more damage we inflict, and
+        * the more time ztest spends in recovering that damage. We chose
+        * to induce damage 1/100th of the time so recovery is tested but
+        * not so frequently that ztest doesn't get to test other code paths.
         */
-       zfs_reconstruct_indirect_damage_fraction = 4;
+       zfs_reconstruct_indirect_damage_fraction = 100;
 
        action.sa_handler = sig_handler;
        sigemptyset(&action.sa_mask);