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Re: File corruption?

Thanks!  I followed Andrew’s instructions and got a photo of the stack trace and sent it to him directly.  Hope it helps him figure out what’s happening.


On Jan 19, 2020, at 11:29 AM, Greg Troxel <> wrote:

> Robert Nestor <> writes:
>> Sorry for not being specific.  When I do the shutdown on a subsequent
>> reboot all the filesystems are dirty forcing fsck to run.  Sometimes
>> it finds some minor errors and repairs them.
> ok - I am trying to separate "corruption", which means that files that
> were not in the process of being written were damaged, from an unclean
> shutdown with the usual non-frightening fixups.
>> I’m running xfce4, so when I do the “shutdown -r now” I see xfce4 and
>> X exit bringing me back to the console display that was active when I
>> booted the system.  As it goes thru the normal shutdown process it
>> reaches a point where I get the assertion error (something like
>> “uvm_page locked against owner”) followed by a stack trace and then
>> quickly followed by the system rebooting.  There is no crash file
>> generated.
> (Definitely follow ad@'s advice here.)
> You can of course exit xfe4 back to console before starting this.
>> I haven’t changed any crash parameters from the stock setup.  I seem
>> to recall there used to be one for kernel crashes, but can’t find it
>> now.  I guess next step is to boot up with the “-d” flag and see if I
>> can get something useful.  Is that correct?
> See swapctl(8) and fstab(5).  Basically you need to configure a dump
> device (almost always the swap device).  swapctl -l is useful.
> But, it is likely that after sending ad@ a picture, you won't have to
> debug this any more...

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