Hello:
This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@xxxxxxxxxxxxx>:
On Tue, 20 Feb 2024 15:50:01 -0800 you wrote:
> From: Alexei Starovoitov <ast@xxxxxxxxxx>
>
> Back in 2018 the commit be95a845cc44 ("bpf: avoid false sharing of map refcount with max_entries")
> added ____cacheline_aligned to "struct bpf_map" to make sure that fields like
> refcnt don't share a cache line with max_entries that is used to bounds check
> map access. That was done to make spectre style attacks harder. The main
> mitigation is done via code similar to array_index_nospec(), of course.
> This was an additional precaution.
> It increased the size of "struct bpf_map" a little, but it's affect
> on all other maps (like array) is significant, since "struct bpf_map" is
> typically the first member in other map types.
>
> [...]
Here is the summary with links:
- [bpf-next] bpf: Shrink size of struct bpf_map/bpf_array.
https://git.kernel.org/bpf/bpf-next/c/f86783991809
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
