Re: [PATCH v2 00/12] Add build ID to stacktraces

[Stephen Boyd]

Quoting peter enderborg (2021-03-25 04:06:17)
> On 3/24/21 9:55 AM, Christoph Hellwig wrote:
> > On Tue, Mar 23, 2021 at 07:04:31PM -0700, Stephen Boyd wrote:
> >>  x5 : 0000000000000000 x4 : 0000000000000001
> >>  x3 : 0000000000000008 x2 : ffffff93fef25a70
> >>  x1 : ffffff93fef15788 x0 : ffffffe3622352e0
> >>  Call trace:
> >>   lkdtm_WARNING+0x28/0x30 [lkdtm ed5019fdf5e53be37cb1ba7899292d7e143b259e]
> >>   direct_entry+0x16c/0x1b4 [lkdtm ed5019fdf5e53be37cb1ba7899292d7e143b259e]
> > Yikes.  No, please do not make the backtraces a complete mess for
> > something that serves absolutely no need.

It serves a need. Please look at the patches to understand that I'm
adding the buildid to automatically find the associated debug
information on distros.

> 
> Would a "verbose" flag be acceptable solution?    Something like write 1 to /sys/kernel/debug/verbose_stack to get the extra info.
> 
> I think I see a need for it.
> 

Or a kernel config option and a commandline parameter? That would be OK
for me as I said on v1 of this series. I'll add that in for the next
patch series given all the distaste for some more hex characters next to
the module name.