From: Will Deacon <will.deacon@arm.com>
To: Joel Fernandes <joel@joelfernandes.org>
Cc: linux-mips@linux-mips.org, Rich Felker <dalias@libc.org>,
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"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH 2/4] mm: speed up mremap by 500x on large regions (v2)
Date: Mon, 29 Oct 2018 10:28:40 +0000 [thread overview]
Message-ID: <20181029102840.GC13965@arm.com> (raw)
In-Reply-To: <20181026211148.GA140716@joelaf.mtv.corp.google.com>
On Fri, Oct 26, 2018 at 02:11:48PM -0700, Joel Fernandes wrote:
> My thinking is to take it slow and get the patch in in its current state,
> since it improves x86. Then as a next step, look into why the arm64 tlb
> flushes are that expensive and look into optimizing that. On arm64 I am
> testing on a 4.9 kernel so I'm wondering there are any optimizations since
> 4.9 that can help speed it up there. After that, if all else fails about
> speeding up arm64, then I look into developing the cleanest possible solution
> where we can keep the lock held for longer and flush lesser.
We rewrote a good chunk of the arm64 TLB invalidation and core mmu_gather
code this merge window, so please do have another look at -rc1!
Will
next prev parent reply other threads:[~2018-10-29 11:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-13 1:31 [PATCH 0/4] Add support for fast mremap Joel Fernandes (Google)
2018-10-13 1:31 ` [PATCH 1/4] treewide: remove unused address argument from pte_alloc functions (v2) Joel Fernandes (Google)
2018-10-24 8:37 ` Peter Zijlstra
2018-10-25 2:21 ` Joel Fernandes
2018-10-26 8:52 ` Peter Zijlstra
2018-10-25 10:47 ` Kirill A. Shutemov
2018-10-26 8:50 ` Peter Zijlstra
2018-10-13 1:31 ` [PATCH 2/4] mm: speed up mremap by 500x on large regions (v2) Joel Fernandes (Google)
2018-10-15 9:42 ` Christoph Hellwig
2018-10-15 22:33 ` Joel Fernandes
2018-10-16 11:29 ` Vlastimil Babka
2018-10-16 19:43 ` Joel Fernandes
2018-10-17 7:38 ` Vlastimil Babka
2018-10-24 10:12 ` Kirill A. Shutemov
2018-10-24 11:57 ` Balbir Singh
2018-10-24 12:57 ` Kirill A. Shutemov
2018-10-25 2:09 ` Joel Fernandes
2018-10-25 10:19 ` Kirill A. Shutemov
2018-10-26 21:11 ` Joel Fernandes
2018-10-29 10:28 ` Will Deacon [this message]
2018-10-25 2:13 ` Joel Fernandes
2018-10-27 10:21 ` Balbir Singh
2018-10-27 19:39 ` Joel Fernandes
2018-10-28 22:40 ` Balbir Singh
2018-10-13 1:31 ` [PATCH 3/4] arm64: select HAVE_MOVE_PMD for faster mremap (v1) Joel Fernandes (Google)
2018-10-13 1:32 ` [PATCH 4/4] x86: " Joel Fernandes (Google)
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