linux-kernel - Re: [PATCH 11/26] mm/mips: Use general page fault accounting

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Date:   Thu, 25 Jun 2020 10:28:37 +0200
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Peter Xu <peterx@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Gerald Schaefer <gerald.schaefer@...ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Will Deacon <will@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH 11/26] mm/mips: Use general page fault accounting

On Fri, Jun 19, 2020 at 12:05:23PM -0400, Peter Xu wrote:
> Use the general page fault accounting by passing regs into handle_mm_fault().
> It naturally solve the issue of multiple page fault accounting when page fault
> retry happened.
> 
> Fix PERF_COUNT_SW_PAGE_FAULTS perf event manually for page fault retries, by
> moving it before taking mmap_sem.
> 
> CC: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> CC: linux-mips@...r.kernel.org
> Signed-off-by: Peter Xu <peterx@...hat.com>
> ---
>  arch/mips/mm/fault.c | 14 +++-----------
>  1 file changed, 3 insertions(+), 11 deletions(-)

Acked-by: Thomas Bogendoerfer <tsbogend@...ha.franken.de>

Thomas.

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