linux-kernel - Re: [PATCH v2] riscv: support PREEMPT

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Date:   Wed, 30 Aug 2023 13:20:34 +0000
From:   patchwork-bot+linux-riscv@...nel.org
To:     Jisheng Zhang <jszhang@...nel.org>
Cc:     linux-riscv@...ts.infradead.org, paul.walmsley@...ive.com,
        palmer@...belt.com, aou@...s.berkeley.edu, arnd@...db.de,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH v2] riscv: support PREEMPT_DYNAMIC with static keys

Hello:

This patch was applied to riscv/linux.git (for-next)
by Palmer Dabbelt <palmer@...osinc.com>:

On Mon, 17 Jul 2023 00:49:25 +0800 you wrote:
> Currently, each architecture can support PREEMPT_DYNAMIC through
> either static calls or static keys. To support PREEMPT_DYNAMIC on
> riscv, we face three choices:
> 
> 1. only add static calls support to riscv
> As Mark pointed out in commit 99cf983cc8bc ("sched/preempt: Add
> PREEMPT_DYNAMIC using static keys"), static keys "...should have
> slightly lower overhead than non-inline static calls, as this
> effectively inlines each trampoline into the start of its callee. This
> may avoid redundant work, and may integrate better with CFI schemes."
> So even we add static calls(without inline static calls) to riscv,
> static keys is still a better choice.
> 
> [...]

Here is the summary with links:
  - [v2] riscv: support PREEMPT_DYNAMIC with static keys
    https://git.kernel.org/riscv/c/15e062726f55

You are awesome, thank you!
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