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From: Thomas Gleixner <tglx@linutronix.de>
To: Balbir Singh <sblbir@amazon.com>, mingo@redhat.com
Cc: peterz@infradead.org, linux-kernel@vger.kernel.org,
	keescook@chromium.org, jpoimboe@redhat.com, tony.luck@intel.com,
	benh@kernel.crashing.org, x86@kernel.org, dave.hansen@intel.com,
	thomas.lendacky@amd.com, torvalds@linux-foundation.org,
	Balbir Singh <sblbir@amazon.com>
Subject: Re: [PATCH v3 1/5] x86/mm: change l1d flush runtime prctl behaviour
Date: Fri, 04 Dec 2020 22:07:56 +0100	[thread overview]
Message-ID: <87r1o59t5f.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20201127065938.8200-2-sblbir@amazon.com>

On Fri, Nov 27 2020 at 17:59, Balbir Singh wrote:

> Detection of task affinities at API opt-in time is not the best
> approach, the approach is to kill the task if it runs on a
> SMT enable core. This is better than not flushing the L1D cache
> when the task switches from a non-SMT core to an SMT enabled core.
>
> Signed-off-by: Balbir Singh <sblbir@amazon.com>
> ---
>  arch/x86/include/asm/processor.h |  2 ++
>  arch/x86/kernel/smpboot.c        | 11 ++++++++++-
>  2 files changed, 12 insertions(+), 1 deletion(-)

Subject, changelog match but patch content not so much :)


  reply	other threads:[~2020-12-04 21:08 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-27  6:59 [PATCH v3 0/5] Next revision of the L1D flush patches Balbir Singh
2020-11-27  6:59 ` [PATCH v3 1/5] x86/mm: change l1d flush runtime prctl behaviour Balbir Singh
2020-12-04 21:07   ` Thomas Gleixner [this message]
2020-12-04 22:44     ` Singh, Balbir
2020-11-27  6:59 ` [PATCH v3 2/5] x86/mm: Refactor cond_ibpb() to support other use cases Balbir Singh
2020-11-27  6:59 ` [PATCH v3 3/5] x86/mm: Optionally flush L1D on context switch Balbir Singh
2020-12-04 21:21   ` Thomas Gleixner
2020-12-04 22:41     ` Singh, Balbir
2020-11-27  6:59 ` [PATCH v3 4/5] prctl: Hook L1D flushing in via prctl Balbir Singh
2020-12-04 22:19   ` Thomas Gleixner
2020-12-05  2:56     ` Balbir Singh
2020-11-27  6:59 ` [PATCH v3 5/5] Documentation: Add L1D flushing Documentation Balbir Singh

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