Hi, Mike, I got "attempt to access beyond end of device dm-0: rw=0, want=3129056, limit=2097152" error when I was reloading the table of dm-0, while there's a background **direct** IO on dm-0 (no fs on it, i.e., just raw device) meanwhile. It seems that it fails bio_check_eod() in submit_bio(). But when I formatted one ext4 filesystem on dm-0, and the background IO pressure is redirected to one file inside the ext4 filesystem, I didn't encounter this error anymore when I reload dm-0. I think it's because the filesystem gets frozen since lock_fs() in __dm_suspend(). So is this a known issue? -- Thanks, Jeffle -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel