Quoting r. Jun'ichi Nomura <j-nomura at ce.jp.nec.com>: > Subject: Re: 2.6.19-rc3: known unfixed regressions (v3) > > 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? No, I don't have any out-of-tree modules. > 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. I agree this could be just papering over some issue. The test results (of both git-bisect and reverting the patch) seem to be pretty consistent so far though. Keep me posted if you rework the patch. > >> Have you seen any unusual kernel messages or symptoms regarding > >> dm/md before the ACPI problem occurs? > > > > I haven't. > > Thanks, -- MST
