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From: Peter Zijlstra <peterz@infradead.org>
To: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
	acme@kernel.org, tglx@linutronix.de, mingo@redhat.com,
	linux-kernel@vger.kernel.org, eranian@google.com,
	jolsa@redhat.com, namhyung@kernel.org, ak@linux.intel.com,
	luto@amacapital.net, Vlastimil Babka <vbabka@suse.cz>,
	Will Deacon <will.deacon@arm.com>
Subject: Re: [PATCH V4 01/13] perf/core, x86: Add PERF_SAMPLE_DATA_PAGE_SIZE
Date: Mon, 4 Feb 2019 11:54:09 +0100
Message-ID: <20190204105409.GA17550@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <9fbb7bd3-b150-1ed1-bf03-c44d789172d0@linux.intel.com>

On Fri, Feb 01, 2019 at 11:16:51AM -0500, Liang, Kan wrote:

> > 	if (p4d_large(*p4d)) {
> 
> This one looks like x86 specific?

> > 	if (pud_large(*pud)) {

> > 	if (pmd_large(*pmd)) {

Kirill did indeed note that p*_large() isn't universally availale (but
there's definitely !x86 archs that have them). He also said it would
probably make sense to have them universally available and might help
clean up mm/gup.c a little.

A quick grep shows that: ARM, PowerPC, S390, Sparc and x86 have
'pmd_large'.

Anyway; it probably makes sense (and shouldn't be too hard) to fix up
all architectures to provide this.

  reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-31 20:27 kan.liang
2019-01-31 20:27 ` [PATCH V4 02/13] perf tools: Support new sample type for data page size kan.liang
2019-01-31 20:27 ` [PATCH V4 03/13] perf script: Support " kan.liang
2019-01-31 20:27 ` [PATCH V4 04/13] perf sort: Add sort option for " kan.liang
2019-01-31 20:27 ` [PATCH V4 05/13] perf mem: Factor out a function to generate sort order kan.liang
2019-01-31 20:27 ` [PATCH V4 06/13] perf mem: Clean up output format kan.liang
2019-01-31 20:28 ` [PATCH V4 07/13] perf mem: Support data page size kan.liang
2019-01-31 20:28 ` [PATCH V4 08/13] perf test: Add test case for PERF_SAMPLE_DATA_PAGE_SIZE kan.liang
2019-01-31 20:28 ` [PATCH V4 09/13] perf/core, x86: Add support for PERF_SAMPLE_CODE_PAGE_SIZE kan.liang
2019-01-31 20:28 ` [PATCH V4 10/13] perf tools: " kan.liang
2019-01-31 20:28 ` [PATCH V4 11/13] perf script: " kan.liang
2019-01-31 20:28 ` [PATCH V4 12/13] perf report: " kan.liang
2019-01-31 20:28 ` [PATCH V4 13/13] perf test: Add test case " kan.liang
2019-02-01  9:22 ` [PATCH V4 01/13] perf/core, x86: Add PERF_SAMPLE_DATA_PAGE_SIZE Peter Zijlstra
2019-02-01 10:03   ` Peter Zijlstra
2019-02-01 10:36     ` Kirill A. Shutemov
2019-02-01 12:43       ` Peter Zijlstra
2019-02-01 12:47         ` Peter Zijlstra
2019-02-01 16:16         ` Liang, Kan
2019-02-04 10:54           ` Peter Zijlstra [this message]
2019-02-06 20:23             ` Liang, Kan
2019-02-01 10:34   ` Kirill A. Shutemov
2019-02-01 14:45   ` Liang, Kan

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