Hi, Lately (i.e. 3.10.5) I thought I'd give bcache a try on my work laptop. I paired up a boring SATA SSD with one of those newfangled 4k "advanced format" drives, and formatted the whole stack with dm-crypt + lvm + ext4 on top of bcache. Things were looking pretty good -- LKML loads much faster in mutt, and all was well with the world, even suspend/resume worked fine.
Then I rebooted the machine. After the reboot, the machine will hang every time I suspend. I set up netconsole and set no_console_suspend=1, but nothing interesting showed up in dmesg. I see that SCSI managed to flush the disks, but everything seems to stop dead. No lockup messages or anything. Curiously, if I set up a bcache between that SSD and a 512-byte-sector old school disk, suspend/resume seem fine even after a reboot. My bcache test machine also suspends/resumes just fine. I tried simulating a 4k disk with qemu to see if I could arrange an easier testcase, but I couldn't reproduce the hang there either. (Yes, I do have bcache debugging turned on.) I'll keep plugging away on this as time permits, but I was wondering -- has anyone else seen this before? Is this my own little crazy party? I was careful to make sure everything on the AF drive lined up on a 4k alignment. <shrug> --D -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
