linux-hardening - Re: [PATCH v5 00/25] context_tracking,x86: Defer some IPIs until a user->kernel transition

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Message-ID: <fefcd1a6-f146-4f3c-b28b-f907e7346ddd@intel.com>
Date: Tue, 29 Apr 2025 09:11:57 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Valentin Schneider <vschneid@...hat.com>, linux-kernel@...r.kernel.org,
 virtualization@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
 loongarch@...ts.linux.dev, linux-riscv@...ts.infradead.org,
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 bpf@...r.kernel.org
Cc: Juri Lelli <juri.lelli@...hat.com>, Marcelo Tosatti
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Subject: Re: [PATCH v5 00/25] context_tracking,x86: Defer some IPIs until a
 user->kernel transition

I don't think we should do this series.

If folks want this functionality, they should get a new CPU that can
flush the TLB without IPIs.