From: patchwork-bot+netdevbpf@kernel.org
To: Artem Savkov <asavkov@redhat.com>
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
bpf@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, aarcange@redhat.com,
dvacek@redhat.com, olsajiri@gmail.com, song@kernel.org,
dxu@dxuuu.xyz, memxor@gmail.com
Subject: Re: [PATCH bpf-next v5 0/3] destructive bpf_kfuncs
Date: Wed, 10 Aug 2022 16:30:16 +0000 [thread overview]
Message-ID: <166014901698.26898.12684147799083436971.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20220810065905.475418-1-asavkov@redhat.com>
Hello:
This series was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@kernel.org>:
On Wed, 10 Aug 2022 08:59:02 +0200 you wrote:
> eBPF is often used for kernel debugging, and one of the widely used and
> powerful debugging techniques is post-mortem debugging with a full memory dump.
> Triggering a panic at exactly the right moment allows the user to get such a
> dump and thus a better view at the system's state. Right now the only way to
> do this in BPF is to signal userspace to trigger kexec/panic. This is
> suboptimal as going through userspace requires context changes and adds
> significant delays taking system further away from "the right moment". On a
> single-cpu system the situation is even worse because BPF program won't even be
> able to block the thread of interest.
>
> [...]
Here is the summary with links:
- [bpf-next,v5,1/3] bpf: add destructive kfunc flag
https://git.kernel.org/bpf/bpf-next/c/4dd48c6f1f83
- [bpf-next,v5,2/3] bpf: export crash_kexec() as destructive kfunc
https://git.kernel.org/bpf/bpf-next/c/133790596406
- [bpf-next,v5,3/3] selftests/bpf: add destructive kfunc test
https://git.kernel.org/bpf/bpf-next/c/e33894581675
You are awesome, thank you!
--
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prev parent reply other threads:[~2022-08-10 16:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-10 6:59 [PATCH bpf-next v5 0/3] destructive bpf_kfuncs Artem Savkov
2022-08-10 6:59 ` [PATCH bpf-next v5 1/3] bpf: add destructive kfunc flag Artem Savkov
2022-08-10 6:59 ` [PATCH bpf-next v5 2/3] bpf: export crash_kexec() as destructive kfunc Artem Savkov
2022-08-10 6:59 ` [PATCH bpf-next v5 3/3] selftests/bpf: add destructive kfunc test Artem Savkov
2022-08-10 16:30 ` patchwork-bot+netdevbpf [this message]
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