From: Alan Maguire <alan.maguire@oracle.com>
To: lmb@isovalent.com
Cc: andrii@kernel.org, arnd@arndb.de, ast@kernel.org,
bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com,
haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org,
kpsingh@kernel.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
martin.lau@linux.dev, mykolal@fb.com, sdf@fomichev.me,
shuah@kernel.org, song@kernel.org, yonghong.song@linux.dev
Subject: Re: [PATCH bpf-next v4 0/3] Allow mmap of /sys/kernel/btf/vmlinux
Date: Thu, 15 May 2025 08:51:45 +0100 [thread overview]
Message-ID: <fb6121db-9872-4e33-bc7b-82b026b0097a@oracle.com> (raw)
In-Reply-To: <20250510-vmlinux-mmap-v4-0-69e424b2a672@isovalent.com>
> I'd like to cut down the memory usage of parsing vmlinux BTF in ebpf-go.
> With some upcoming changes the library is sitting at 5MiB for a parse.
> Most of that memory is simply copying the BTF blob into user space.
> By allowing vmlinux BTF to be mmapped read-only into user space I can
> cut memory usage by about 75%.
>
> Signed-off-by: Lorenz Bauer <lmb@isovalent.com>
For the series,
Tested-by: Alan Maguire <alan.maguire@oracle.com>
Tested with 4k and 64k page size on aarch64; all worked perfectly. Thanks!
next prev parent reply other threads:[~2025-05-15 7:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-10 12:34 [PATCH bpf-next v4 0/3] Allow mmap of /sys/kernel/btf/vmlinux Lorenz Bauer
2025-05-10 12:34 ` [PATCH bpf-next v4 1/3] btf: allow mmap of vmlinux btf Lorenz Bauer
2025-05-10 12:34 ` [PATCH bpf-next v4 2/3] selftests: bpf: add a test for mmapable vmlinux BTF Lorenz Bauer
2025-05-10 12:34 ` [PATCH bpf-next v4 3/3] libbpf: Use mmap to parse vmlinux BTF from sysfs Lorenz Bauer
2025-05-12 22:33 ` Andrii Nakryiko
2025-05-15 7:51 ` Alan Maguire [this message]
2025-05-20 23:22 ` [PATCH bpf-next v4 0/3] Allow mmap of /sys/kernel/btf/vmlinux Tony Ambardar
2025-05-21 15:00 ` vmlinux BTF as a module (was Re: [PATCH bpf-next v4 0/3] Allow mmap of /sys/kernel/btf/vmlinux) Alan Maguire
2025-05-23 1:04 ` Alexei Starovoitov
2025-05-23 17:27 ` Andrii Nakryiko
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