From: Kees Cook <kees@kernel.org>
To: Shung-Hsi Yu <shung-hsi.yu@suse.com>,
bpf@vger.kernel.org, linux-mm@kvack.org,
Andrii Nakryiko <andrii@kernel.org>,
Ihor Solodrai <ihor.solodrai@linux.dev>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>,
Uladzislau Rezki <urezki@gmail.com>,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org,
regressions@lists.linux.dev,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Eduard Zingerman <eddyz87@gmail.com>
Subject: Re: [REGRESSION] bpf verifier slowdown due to vrealloc() change since 6.15-rc6
Date: Thu, 15 May 2025 09:51:15 -0700 [thread overview]
Message-ID: <202505150911.1254C695D@keescook> (raw)
In-Reply-To: <C66C764E-C898-457D-93F0-A680983707F0@kernel.org>
On Thu, May 15, 2025 at 07:51:26AM -0700, Kees Cook wrote:
> On May 15, 2025 6:12:25 AM PDT, Shung-Hsi Yu <shung-hsi.yu@suse.com> wrote:
> >There is an observable slowdown when running BPF selftests on 6.15-rc6
> >kernel[1] built with tools/testing/selftests/bpf/{config,config.x86_64}.
> [...]
> Where can I find the .config for the slow runs?
Oops, I can read. :) Doing a build now...
> And how do I run the test myself directly?
I found:
https://docs.kernel.org/bpf/bpf_devel_QA.html
But it doesn't seem to cover a bunch of stuff (no way to prebuild the
tests, no info on building the test modules).
This seems to be needed:
make O=regression-bug -C tools/testing/selftests/bpf/test_kmods
But then the booted kernel doesn't load it (missing signatures?)
Anyway, I'll keep digging...
--
Kees Cook
next prev parent reply other threads:[~2025-05-15 16:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-15 13:12 Shung-Hsi Yu
2025-05-15 14:51 ` Kees Cook
2025-05-15 16:51 ` Kees Cook [this message]
2025-05-15 17:18 ` Pawan Gupta
2025-05-15 17:41 ` Kees Cook
2025-05-15 17:52 ` Pawan Gupta
2025-05-15 20:26 ` Pawan Gupta
2025-05-15 17:53 ` Andrii Nakryiko
2025-05-15 18:24 ` Kees Cook
2025-05-15 18:50 ` Eduard Zingerman
2025-05-15 15:47 ` Kees Cook
2025-05-15 15:53 ` Kees Cook
2025-05-15 15:55 ` Andrii Nakryiko
2025-05-15 16:01 ` Kees Cook
2025-05-15 18:31 ` Eduard Zingerman
2025-05-15 21:36 ` Kees Cook
2025-05-15 21:39 ` Eduard Zingerman
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