Messages in this thread |  | | Date | Thu, 2 Jan 1997 01:21:31 -0700 | From | (Erik Andersen) | Subject | Re: super.c - kerneld race condition in 2.0.27 |
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On Jan 2, 1997, tyson@rwii.com (tyson@rwii.com) wrote: > >From linux/fs/super.c and linux/CREDITS > --------------------------------------- > Added kerneld support: Jacques Gelinas and Bjorn Ekwall > jacques@solucorp.qc.ca, bj0rn@blox.se > > >From linux/drivers/ide-cd.c and linux/CREDITS > --------------------------------------------- > N: Scott Snyder > E: snyder@fnald0.fnal.gov
Actually, Scott has moved on to other things. I am the ide-cd maintainer now. I should probably have Linus list me as the Maintainer for 2.0.28 so people will stop bothering scott.
> > > Below is what I think is a fairly well documented oops. However, after > a bit of research I think that what causes the oops is more interesting > than the remains after it. This is from Linux-2.0.27. > > The problem seems to be a race condition between block device drivers, > the VFS and kerneld. If I try to mount an IDE-CDROM drive with no > disk in the drive, the IDE-CD takes 1-2 minutes to determine that > it can't read the non-existent disk. It would be really nice if > the IDE-CD driver didn't take so long to time-out and fail but > that isn't the real problem. > > When trying to mount the disk with '-t iso9660', kerneld is caused > to immediately load 'isofs.o'. During the time that the IDE-CD > block driver is retrying and refailing to read the non-existent > disk, kerneld times out on isofs.o (it is not marked as in use at > this point) and unloads it. When the IDE-CD driver returns with > failure, linux/fs/super.c attempts to access the iso9660 fs code > that has been unloaded by kerneld and causes the oops below. > [----snip, snip, snip-----]
Hmmm. I'll look into this one. Since I don't have to go back to work until Monday (Jan 6), I should be able to do something about this little problem before then.
> Cheers! > Ty >
-Erik
-- Erik B. Andersen Web: http://www.et.byu.edu/~andersee/ 2485 South State St. email: andersee@et.byu.edu or andersee@debian.org Springville, Ut 84663 phone: (801) 489-1231 --This message was written using 73% post-consumer electrons--
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