linux-kernel - Re: [PATCH v2 1/2] perf jitdump: Add sym/str-tables to build-ID generation

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Message-Id: <176478471412.3636162.8826107482964301667.b4-ty@kernel.org>
Date: Wed, 03 Dec 2025 09:58:34 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Ian Rogers <irogers@...gle.com>, James Clark <james.clark@...aro.org>, 
 Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, 
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, 
 LKML <linux-kernel@...r.kernel.org>, linux-perf-users@...r.kernel.org, 
 Eric Biggers <ebiggers@...nel.org>, Pablo Galindo <pablogsal@...il.com>, 
 Fangrui Song <maskray@...rceware.org>
Subject: Re: [PATCH v2 1/2] perf jitdump: Add sym/str-tables to build-ID
 generation

On Tue, 25 Nov 2025 00:07:46 -0800, Namhyung Kim wrote:
> It was reported that python backtrace with JIT dump was broken after the
> change to built-in SHA-1 implementation.  It seems python generates the
> same JIT code for each function.  They will become separate DSOs but the
> contents are the same.  Only difference is in the symbol name.
> 
> But this caused a problem that every JIT'ed DSOs will have the same
> build-ID which makes perf confused.  And it resulted in no python
> symbols (from JIT) in the output.
> 
> [...]
Applied to perf-tools-next, thanks!

Best regards,
Namhyung