Hi Michael, Michael S. Tsirkin wrote: >> The code is related to bd_claim_by_disk which is called when >> device-mapper or md tries to mark the underlying devices >> for exclusive use and creates symlinks from/to the devices >> in sysfs. The patch added error handlings which weren't in >> the original code. >> >> I have no idea how it affects ACPI event handling. > > It's a mystery. Probably exposes a bug somewhere? > >> Are you using dm and/or md on your machine? > > The .config is attached to bugzilla. OK, I found you disabled CONFIG_MD, which means neither dm.ko nor md.ko was built. Do you have any out-of-tree kernel modules which call either bd_claim_by_kobject or bd_claim_by_disk? If you aren't using either of them, I'm afraid reverting the patch doesn't really solve your problem because the patched code is called only from them. >> Have you seen any unusual kernel messages or symptoms regarding >> dm/md before the ACPI problem occurs? > > I haven't. Thanks, -- Jun'ichi Nomura, NEC Corporation of America
