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From: Ingo Molnar <mingo@kernel.org>
To: Rik van Riel <riel@surriel.com>
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
	kernel-team@fb.com, songliubraving@fb.com, will.deacon@arm.com,
	hpa@zytor.com, luto@kernel.org, npiggin@gmail.com,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH 0/7] x86/mm/tlb: make lazy TLB mode even lazier
Date: Wed, 24 Oct 2018 07:53:19 +0200	[thread overview]
Message-ID: <20181024055319.GA73309@gmail.com> (raw)
In-Reply-To: <20180924183759.23955-1-riel@surriel.com>


* Rik van Riel <riel@surriel.com> wrote:

> The big thing remaining is the reference count overhead of
> the lazy TLB mm_struct, but getting rid of that is rather a
> lot of code for a small performance gain. Not quite what
> Linus asked for :)

BTW., what would be the plan to improve scalability there,
is it even possible?

Also, it would be nice to integrate some of those workloads
into a simple 'perf bench mm' or 'perf bench tlb' subcommand,
see tools/perf/bench/ on how to add benchmarking modules.

Thanks,

	Ingo

  parent reply	other threads:[~2018-10-24  5:53 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-24 18:37 [PATCH 0/7] x86/mm/tlb: make lazy TLB mode even lazier Rik van Riel
2018-09-24 18:37 ` [PATCH 1/7] x86/mm/tlb: Always use lazy TLB mode Rik van Riel
2018-09-24 18:37 ` [PATCH 2/7] x86/mm/tlb: Restructure switch_mm_irqs_off() Rik van Riel
2018-09-24 18:37 ` [PATCH 3/7] smp: use __cpumask_set_cpu in on_each_cpu_cond Rik van Riel
2018-09-24 18:37 ` [PATCH 4/7] smp,cpumask: introduce on_each_cpu_cond_mask Rik van Riel
2018-09-24 18:37 ` [PATCH 5/7] Add freed_tables argument to flush_tlb_mm_range Rik van Riel
2018-09-24 18:37 ` [PATCH 6/7] Add freed_tables element to flush_tlb_info Rik van Riel
2018-09-24 18:37 ` [PATCH 7/7] x86/mm/tlb: Make lazy TLB mode lazier Rik van Riel
2018-09-24 18:50 ` [PATCH 0/7] x86/mm/tlb: make lazy TLB mode even lazier Rik van Riel
2018-10-24  5:53 ` Ingo Molnar [this message]
2018-10-24 12:52   ` Rik van Riel

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