Re: [REGRESSION] 6.6.10+ and 6.7+ kernels lock up early in init.

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On Tue, 2024-01-23 at 07:39 +0100, Linux regression tracking (Thorsten
Leemhuis) wrote:
> [a quick follow up with an important correction from the reporter for
> those I added to the list of recipients]
> 
> On 23.01.24 06:37, Linux regression tracking (Thorsten Leemhuis) wrote:
> > On 23.01.24 05:40, Paul Thompson wrote:
> > > 
> > > 	With my longstanding configuration, kernels upto 6.6.9 work fine.
> > > Kernels 6.6.1[0123] and 6.7.[01] all lock up in early (open-rc) init,
> > > before even the virtual filesystems are mounted.
> > > 
> > > 	The last thing visible on the console is the nfsclient service
> > > being started and:
> > > 
> > > Call to flock failed: Funtion not implemented. (twice)
> > > 
> > > 	Then the machine is unresponsive, numlock doesnt toggle the keyboard led,
> > > and the alt-sysrq chords appear to do nothing.
> > > 
> > > 	The problem is solved by changing my 6.6.9 config option:
> > > 
> > > # CONFIG_FILE_LOCKING is not set
> > > to
> > > CONFIG_FILE_LOCKING=y
> > > 
> > > (This option is under File Systems > Enable POSIX file locking API)
> 
> The reporter replied out-of-thread:
> https://lore.kernel.org/all/Za9TRtSjubbX0bVu@xxxxxxxxxxxxxxx/
> 
> """
> 	Now I feel stupid or like Im losing it, but I went back and grepped for
> the CONFIG_FILE_LOCKING in my old Configs, and it was turned on in all
> but 6.6.9. So, somehow I turned that off *after I built 6.6.9? Argh. I
> just built 6.6.4 with it unset and that locked up too.
> 	Sorry if this is just noise, though one would have hoped the failure
> was less severe...
> """
> 

Ok, so not necessarily a regression? It might be helpful to know the
earliest kernel you can boot with CONFIG_FILE_LOCKING turned off.

> > 
I'll give a try reproducing this later though.
-- 
Jeff Layton <jlayton@xxxxxxxxxx>





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