From: Dave Hansen <dave.hansen@intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
Bin Yang <bin.yang@intel.com>, Mark Gross <mark.gross@intel.com>
Subject: Re: [PATCH 2/8] x86/mm/cpa: Move flush_tlb_all()
Date: Fri, 21 Sep 2018 14:34:32 -0700 [thread overview]
Message-ID: <5ab3ee67-a29b-0f4c-d7cf-2bdedd192ad6@intel.com> (raw)
In-Reply-To: <20180919085947.882287392@infradead.org>
On 09/19/2018 01:50 AM, Peter Zijlstra wrote:
> @@ -1528,28 +1538,8 @@ static int __change_page_attr(struct cpa
> * We have to split the large page:
> */
> err = split_large_page(cpa, kpte, address);
> - if (!err) {
...
> - flush_tlb_all();
> + if (!err)
> goto repeat;
> - }
I _think_ this is the only use of split_large_page()'s error code. We
can just make it return void now, right?
BTW, I also really like doing the "final" TLB flush as close as possible
to the actual PTE manipulation. Makes it much less likely that we break it.
next prev parent reply other threads:[~2018-09-21 21:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-19 8:50 [PATCH 0/8] x86/mm/cpa: Further optimizations Peter Zijlstra
2018-09-19 8:50 ` [PATCH 1/8] x86/mm/cpa: Use flush_tlb_all() Peter Zijlstra
2018-09-19 9:15 ` Peter Zijlstra
2018-09-19 10:08 ` Thomas Gleixner
2018-09-27 18:51 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-09-19 8:50 ` [PATCH 2/8] x86/mm/cpa: Move flush_tlb_all() Peter Zijlstra
2018-09-21 21:34 ` Dave Hansen [this message]
2018-09-22 10:37 ` Peter Zijlstra
2018-09-24 16:11 ` Dave Hansen
2018-09-27 18:52 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-09-19 8:50 ` [PATCH 3/8] x86/mm/cpa: Unconditionally avoid WBINDV when we can Peter Zijlstra
2018-09-27 18:53 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-09-19 8:50 ` [PATCH 4/8] x86/mm/cpa: Use flush_tlb_kernel_range() Peter Zijlstra
2018-09-27 18:53 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-09-19 8:50 ` [PATCH 5/8] x86/mm/cpa: Move CLFLUSH test into cpa_flush_range() Peter Zijlstra
2018-09-27 18:54 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-09-19 8:50 ` [PATCH 6/8] x86/mm/cpa: Move CLFLUSH test into cpa_flush_array() Peter Zijlstra
2018-09-27 18:54 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-09-19 8:50 ` [PATCH 7/8] x86/mm/cpa: Factor common code between cpa_flush_*() Peter Zijlstra
2018-09-27 18:55 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-09-19 8:50 ` [PATCH 8/8] x86/mm/cpa: Optimize __cpa_flush_range() Peter Zijlstra
2018-09-27 18:55 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-09-21 22:50 ` [PATCH 0/8] x86/mm/cpa: Further optimizations Dave Hansen
2018-09-21 22:50 ` Dave Hansen
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