Re: [PATCH 5/7] printk: Make %pS and friends print module build ID

[Matthew Wilcox]

On Mon, Mar 01, 2021 at 09:43:19PM -0500, Steven Rostedt wrote:
> On Mon,  1 Mar 2021 09:47:47 -0800
> Stephen Boyd <swboyd@xxxxxxxxxxxx> wrote:
> 
> > The %pS printk format (among some others) is used to print kernel
> > addresses symbolically. When the kernel prints an address inside of a
> > module, the kernel prints the addresses' symbol name along with the
> > module's name that contains the address. Let's make kernel stacktraces
> > easier to identify on KALLSYMS builds by including the build ID of a
> > module when we print the address.
> 
> Please no!
> 
> This kills the output of tracing with offset, and can possibly break
> scripts. I don't want to look at traces like this!
> 
>           <idle>-0       [004] ..s1   353.842577: ipv4_conntrack_in+0x0/0x10 [nf_conntrack] (3b39eb771b2566331887f671c741f90bfba0b051) <-nf_hook_slow+0x40/0xb0

Would it make sense to only print the build-id if it differs from the
build-id of the kernel which has loaded it?