diff options
| -rw-r--r-- | sys/kern/vfs_bio.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index 61fe9a6e2bfd..acd16ecdf3fe 100644 --- a/sys/kern/vfs_bio.c +++ b/sys/kern/vfs_bio.c @@ -1458,9 +1458,16 @@ bufshutdown(int show_busybufs) printf("Final sync complete\n"); /* - * Unmount filesystems. Swapoff before unmount, - * because file-backed swap is non-operational after unmount - * of the underlying filesystem. + * Unmount filesystems and perform swapoff, to quiesce + * the system as much as possible. In particular, no + * I/O should be initiated from top levels since it + * might be abruptly terminated by reset, or otherwise + * erronously handled because other parts of the + * system are disabled. + * + * Swapoff before unmount, because file-backed swap is + * non-operational after unmount of the underlying + * filesystem. */ if (!KERNEL_PANICKED()) { swapoff_all(); |