linux-kernel - Re: [PATCH] x86/insn_decoder_test: allow longer symbol-names

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Date: Mon, 8 Apr 2024 17:30:24 +0200
From: Sergio González Collado <sergio.collado@...il.com>
To: david@...dahead.eu
Cc: miguel.ojeda.sandonis@...il.com, tglx@...utronix.de, x86@...nel.org, 
	mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com, 
	davidgow@...gle.com, hpa@...or.com, john.m.baublitz@...il.com, 
	linux-kernel@...r.kernel.org, mhiramat@...nel.org, mingo@...nel.org, 
	rust-for-linux@...r.kernel.org, Danilo Krummrich <danilokrummrich@...oo.de>
Subject: Re: [PATCH] x86/insn_decoder_test: allow longer symbol-names

David,

 Do you mind if we push the fix you proposed?

Best regards,
 Sergio

On Mon, 8 Apr 2024 at 17:22, Sergio González Collado
<sergio.collado@...il.com> wrote:
>
> Hello,
>
> I was just waiting in case there was feedback from David Rheinsberg.
>
> Cheers!
>
> On Mon, 8 Apr 2024 at 14:52, Danilo Krummrich <danilokrummrich@...oo.de> wrote:
> >
> > On 2/20/24 18:07, Miguel Ojeda wrote:
> > >
> > > On Fri, Jan 27, 2023 at 11:39 AM David Rheinsberg <david@...dahead.eu> wrote:
> > >>
> > >> The current workaround is to just disable CONFIG_X86_DECODER_SELFTEST, which I thought is a sad state. I can gladly use `256 + KSYM_NAME_LEN` and add a comment ala "room for insn-encoding and a symbol name". Would that be acceptable? The alternative would be to try to dyn-alloc a buffer and increase it to the actual line-length?
> > >
> > > John independently hit this issue again. Could we fix this? Going for
> > > the `256 + KSYM_NAME_LEN` sounds good enough for the moment since it
> > > would be a clear improvement, though I agree this could be cleaned up
> > > further.
> >
> > I hit this independently as well. Miguel pointed me on this mail thread
> > when I sent another fix for this in [1].
> >
> > >
> > > Sergio took the approach David suggested in a related patch [1], but
> > > perhaps it is best to submit the fix on its own so that it is easier
> > > to put it in. David, would you be so kind as to submit a v2 with that?
> > > Hopefully x86 can pick it up, otherwise with an Acked-by I am happy to
> > > take it too; and then Sergio can submit his patch on top again.
> >
> > Sergio, David: Do you intend to follow up on this? Otherwise, I can also
> > pick this up and re-submit.
> >
> > - Danilo
> >
> > >
> > > Thanks!
> > >
> > > (Cc'ing also Masami who wrote this originally)
> > >
> > > [1] https://lore.kernel.org/rust-for-linux/20231119180145.157455-1-sergio.collado@gmail.com/
> > >
> > > Cheers,
> > > Miguel
> >
> > [1] https://lore.kernel.org/rust-for-linux/20240325174924.95899-2-dakr@redhat.com/