From: sashiko-bot@kernel.org
To: "Jay Wang" <wanjay@amazon.com>
Cc: linux-modules@vger.kernel.org, dmitry.torokhov@gmail.com,
bpf@vger.kernel.org, linux-input@vger.kernel.org,
sched-ext@lists.linux.dev, ojeda@kernel.org, gary@garyguo.net,
linux-perf-users@vger.kernel.org,
linux-trace-kernel@vger.kernel.org,
"Petr Pavlu" <petr.pavlu@suse.com>
Subject: Re: [PATCH bpf-next v4 01/12] bpf: pass the vmlinux BTF to btf_parse_module() and let it adopt the data
Date: Fri, 02 Oct 2026 09:14:09 +0000 [thread overview]
Message-ID: <20261002091409.677291F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20261001225214.12351-2-wanjay@amazon.com>
> Make btf_parse_module() take the vmlinux BTF as an argument instead of
> fetching it with bpf_get_btf_vmlinux(), and add a data_owned flag: when
> set, the passed .BTF data is an already kvmalloc()ed copy that the new
> btf takes ownership of on success (on failure the caller keeps it).
>
> Factor the sysfs file creation out of the module notifier into
> btf_module_sysfs_add() and the teardown into btf_module_free(), and set
> btf_mod->module right after the allocation rather than under the mutex.
>
> No functional change. This prepares for CONFIG_DEBUG_INFO_BTF=m, where a
> module can be loaded before the vmlinux BTF is available: its .BTF is
> then copied and exposed in sysfs first and parsed later, at which point
> the parser must take the copy as is so that the sysfs file keeps
> pointing at valid data.
>
> Signed-off-by: Jay Wang <wanjay@amazon.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261001225214.12351-1-wanjay@amazon.com?part=1
next prev parent reply other threads:[~2026-10-02 9:14 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-01 22:52 [PATCH bpf-next v4 00/12] bpf: make the vmlinux BTF an on-demand loadable module (CONFIG_DEBUG_INFO_BTF=m) to save ~5.4 MB memory Jay Wang
2026-10-01 22:52 ` [PATCH bpf-next v4 01/12] bpf: pass the vmlinux BTF to btf_parse_module() and let it adopt the data Jay Wang
2026-10-02 9:14 ` sashiko-bot [this message]
2026-10-01 22:52 ` [PATCH bpf-next v4 02/12] bpf: split the kfunc, dtor kfunc and struct_ops registration bodies Jay Wang
2026-10-02 9:14 ` sashiko-bot
2026-10-01 22:52 ` [PATCH bpf-next v4 03/12] bpf: fetch the vmlinux BTF where kernel types enter a program Jay Wang
2026-10-02 9:14 ` sashiko-bot
2026-10-01 22:52 ` [PATCH bpf-next v4 04/12] bpf: take the vmlinux BTF from the btf_vmlinux module Jay Wang
2026-10-01 23:45 ` bot+bpf-ci
2026-10-02 9:14 ` sashiko-bot
2026-10-02 11:48 ` Alexei Starovoitov
2026-10-01 22:52 ` [PATCH bpf-next v4 05/12] bpf, tracing: load the vmlinux BTF where tracefs and bpffs requests start Jay Wang
2026-10-02 9:14 ` sashiko-bot
2026-10-01 22:52 ` [PATCH bpf-next v4 06/12] bpf: defer vmlinux kfunc and struct_ops registrations Jay Wang
2026-10-02 9:14 ` sashiko-bot
2026-10-01 22:52 ` [PATCH bpf-next v4 07/12] bpf: keep module BTF until the vmlinux BTF is available Jay Wang
2026-10-01 23:45 ` bot+bpf-ci
2026-10-02 9:14 ` sashiko-bot
2026-10-01 22:52 ` [PATCH bpf-next v4 08/12] bpf: expose deferred .BTF.base module BTF in sysfs from module load Jay Wang
2026-10-02 9:14 ` sashiko-bot
2026-10-01 22:52 ` [PATCH bpf-next v4 09/12] bpf, trace, net: prepare CONFIG_DEBUG_INFO_BTF checks for a tristate Jay Wang
2026-10-02 9:14 ` sashiko-bot
2026-10-05 11:32 ` Nicolas Schier
2026-10-01 22:52 ` [PATCH bpf-next v4 10/12] resolve_btfids: add --btf_link to fill in .BTF.link records Jay Wang
2026-10-01 23:29 ` bot+bpf-ci
2026-10-02 9:14 ` sashiko-bot
2026-10-01 22:52 ` [PATCH bpf-next v4 11/12] tools, samples: take the vmlinux BTF from vmlinux.unstripped first Jay Wang
2026-10-02 9:14 ` sashiko-bot
2026-10-05 11:17 ` Nicolas Schier
2026-10-01 22:52 ` [PATCH bpf-next v4 12/12] kbuild, bpf: allow building the vmlinux BTF as a module Jay Wang
2026-10-02 9:14 ` sashiko-bot
2026-10-02 9:47 ` Alan Maguire
2026-10-02 4:36 ` [PATCH bpf-next v4 00/12] bpf: make the vmlinux BTF an on-demand loadable module (CONFIG_DEBUG_INFO_BTF=m) to save ~5.4 MB memory Ihor Solodrai
2026-10-02 7:34 ` Jay Wang
2026-10-02 10:05 ` Alan Maguire
2026-10-02 20:58 ` Ihor Solodrai
2026-10-03 6:38 ` Alexei Starovoitov
2026-10-03 11:45 ` Alan Maguire
2026-10-03 12:19 ` Alexei Starovoitov
2026-10-04 22:21 ` Jay Wang
2026-10-05 19:01 ` Ihor Solodrai
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