linux-kernel - Re: [PATCH v3] arm64: run softirqs on the per-CPU IRQ stack

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Message-Id: <166266206917.232050.13406365654648397230.b4-ty@arm.com>
Date:   Thu,  8 Sep 2022 19:34:32 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Qi Zheng <zhengqi.arch@...edance.com>, will@...nel.org,
        mark.rutland@....com, arnd@...db.de
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] arm64: run softirqs on the per-CPU IRQ stack

On Mon, 15 Aug 2022 20:47:39 +0800, Qi Zheng wrote:
> Currently arm64 supports per-CPU IRQ stack, but softirqs
> are still handled in the task context.
> 
> Since any call to local_bh_enable() at any level in the task's
> call stack may trigger a softirq processing run, which could
> potentially cause a task stack overflow if the combined stack
> footprints exceed the stack's size, let's run these softirqs
> on the IRQ stack as well.
> 
> [...]

Applied to arm64 (for-next/misc), thanks!

[1/1] arm64: run softirqs on the per-CPU IRQ stack
      https://git.kernel.org/arm64/c/2d2f3bb897a3

-- 
Catalin