Re: [PATCH v2 0/4] huge vmalloc mappings

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From: Nicholas Piggin <npiggin@gmail.com>
To: David Rientjes <rientjes@google.com>
Cc: Borislav Petkov <bp@alien8.de>,
	Catalin Marinas <catalin.marinas@arm.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linuxppc-dev@lists.ozlabs.org, Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Will Deacon <will@kernel.org>,
	x86@kernel.org
Subject: Re: [PATCH v2 0/4] huge vmalloc mappings
Date: Tue, 14 Apr 2020 22:23:11 +1000	[thread overview]
Message-ID: <1586866432.g0r7udmtjr.astroid@bobo.none> (raw)
In-Reply-To: <alpine.DEB.2.21.2004131727150.260270@chino.kir.corp.google.com>

Excerpts from David Rientjes's message of April 14, 2020 10:27 am:
> On Mon, 13 Apr 2020, Nicholas Piggin wrote:
> 
>> We can get a significant win with larger mappings for some of the big
>> global hashes.
>> 
>> Since RFC, relevant architectures have added p?d_leaf accessors so no
>> real arch changes required, and I changed it not to allocate huge
>> mappings for modules and a bunch of other fixes.
>> 
> 
> Hi Nicholas,
> 
> Any performance numbers to share besides the git diff in the last patch in 
> the series?  I'm wondering if anything from mmtests or lkp-tests makes 
> sense to try?

Hey, no I don't have any other tests I've run. Some of the networking
hashes do make use of it as well though, and might see a few % in
the right kind of workload. There's probably a bunch of other stuff
where it could help a little bit, looking through the tree, I just don't
have anything specific.

Thanks,
Nick

WARNING: multiple messages have this Message-ID (diff)

From: Nicholas Piggin <npiggin@gmail.com>
To: David Rientjes <rientjes@google.com>
Cc: linux-arch@vger.kernel.org, Will Deacon <will@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linuxppc-dev@lists.ozlabs.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 0/4] huge vmalloc mappings
Date: Tue, 14 Apr 2020 22:23:11 +1000	[thread overview]
Message-ID: <1586866432.g0r7udmtjr.astroid@bobo.none> (raw)
In-Reply-To: <alpine.DEB.2.21.2004131727150.260270@chino.kir.corp.google.com>

Excerpts from David Rientjes's message of April 14, 2020 10:27 am:
> On Mon, 13 Apr 2020, Nicholas Piggin wrote:
> 
>> We can get a significant win with larger mappings for some of the big
>> global hashes.
>> 
>> Since RFC, relevant architectures have added p?d_leaf accessors so no
>> real arch changes required, and I changed it not to allocate huge
>> mappings for modules and a bunch of other fixes.
>> 
> 
> Hi Nicholas,
> 
> Any performance numbers to share besides the git diff in the last patch in 
> the series?  I'm wondering if anything from mmtests or lkp-tests makes 
> sense to try?

Hey, no I don't have any other tests I've run. Some of the networking
hashes do make use of it as well though, and might see a few % in
the right kind of workload. There's probably a bunch of other stuff
where it could help a little bit, looking through the tree, I just don't
have anything specific.

Thanks,
Nick

WARNING: multiple messages have this Message-ID (diff)

From: Nicholas Piggin <npiggin@gmail.com>
To: David Rientjes <rientjes@google.com>
Cc: linux-arch@vger.kernel.org, Will Deacon <will@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linuxppc-dev@lists.ozlabs.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 0/4] huge vmalloc mappings
Date: Tue, 14 Apr 2020 22:23:11 +1000	[thread overview]
Message-ID: <1586866432.g0r7udmtjr.astroid@bobo.none> (raw)
In-Reply-To: <alpine.DEB.2.21.2004131727150.260270@chino.kir.corp.google.com>

Excerpts from David Rientjes's message of April 14, 2020 10:27 am:
> On Mon, 13 Apr 2020, Nicholas Piggin wrote:
> 
>> We can get a significant win with larger mappings for some of the big
>> global hashes.
>> 
>> Since RFC, relevant architectures have added p?d_leaf accessors so no
>> real arch changes required, and I changed it not to allocate huge
>> mappings for modules and a bunch of other fixes.
>> 
> 
> Hi Nicholas,
> 
> Any performance numbers to share besides the git diff in the last patch in 
> the series?  I'm wondering if anything from mmtests or lkp-tests makes 
> sense to try?

Hey, no I don't have any other tests I've run. Some of the networking
hashes do make use of it as well though, and might see a few % in
the right kind of workload. There's probably a bunch of other stuff
where it could help a little bit, looking through the tree, I just don't
have anything specific.

Thanks,
Nick

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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

next prev parent reply	other threads:[~2020-04-14 12:24 UTC|newest]

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-13 12:52 [PATCH v2 0/4] huge vmalloc mappings Nicholas Piggin
2020-04-13 12:52 ` Nicholas Piggin
2020-04-13 12:52 ` Nicholas Piggin
2020-04-13 12:53 ` [PATCH v2 1/4] mm/vmalloc: fix vmalloc_to_page for huge vmap mappings Nicholas Piggin
2020-04-13 12:53   ` Nicholas Piggin
2020-04-13 12:53   ` Nicholas Piggin
2020-04-13 13:34   ` Matthew Wilcox
2020-04-13 13:34     ` Matthew Wilcox
2020-04-13 13:34     ` Matthew Wilcox
2020-04-14 11:31     ` Nicholas Piggin
2020-04-14 11:31       ` Nicholas Piggin
2020-04-14 11:31       ` Nicholas Piggin
2020-04-13 12:53 ` [PATCH v2 2/4] mm: Move ioremap page table mapping function to mm/ Nicholas Piggin
2020-04-13 12:53   ` Nicholas Piggin
2020-04-13 12:53   ` Nicholas Piggin
2020-04-13 12:53 ` [PATCH v2 3/4] mm: HUGE_VMAP arch query functions cleanup Nicholas Piggin
2020-04-13 12:53   ` Nicholas Piggin
2020-04-13 12:53   ` Nicholas Piggin
2020-04-13 20:17   ` kbuild test robot
2020-04-13 20:17     ` kbuild test robot
2020-04-13 20:29   ` kbuild test robot
2020-04-13 20:29     ` kbuild test robot
2020-04-13 23:56   ` kbuild test robot
2020-04-13 23:56     ` kbuild test robot
2020-04-13 23:56   ` [PATCH] mm: fix boolreturn.cocci warnings kbuild test robot
2020-04-13 23:56     ` kbuild test robot
2020-04-13 12:53 ` [PATCH v2 4/4] mm/vmalloc: Hugepage vmalloc mappings Nicholas Piggin
2020-04-13 12:53   ` Nicholas Piggin
2020-04-13 12:53   ` Nicholas Piggin
2020-04-13 13:41   ` Matthew Wilcox
2020-04-13 13:41     ` Matthew Wilcox
2020-04-13 13:41     ` Matthew Wilcox
2020-04-14 11:39     ` Nicholas Piggin
2020-04-14 11:39       ` Nicholas Piggin
2020-04-14 11:39       ` Nicholas Piggin
2020-04-14 12:28     ` Christophe Leroy
2020-04-14 12:28       ` Christophe Leroy
2020-04-14 12:28       ` Christophe Leroy
2020-04-14 14:20       ` Matthew Wilcox
2020-04-14 14:20         ` Matthew Wilcox
2020-04-14 14:20         ` Matthew Wilcox
2020-04-14  7:23   ` Christoph Hellwig
2020-04-14  7:23     ` Christoph Hellwig
2020-04-14  7:23     ` Christoph Hellwig
2020-04-14 12:13     ` Nicholas Piggin
2020-04-14 12:13       ` Nicholas Piggin
2020-04-14 12:13       ` Nicholas Piggin
2020-04-14 13:02       ` Christoph Hellwig
2020-04-14 13:02         ` Christoph Hellwig
2020-04-14 13:02         ` Christoph Hellwig
2020-04-14 14:48         ` Nicholas Piggin
2020-04-14 14:48           ` Nicholas Piggin
2020-04-14 14:48           ` Nicholas Piggin
2020-04-15 10:47   ` Will Deacon
2020-04-15 10:47     ` Will Deacon
2020-04-15 10:47     ` Will Deacon
2020-04-16  2:38     ` Nicholas Piggin
2020-04-16  2:38       ` Nicholas Piggin
2020-04-16  2:38       ` Nicholas Piggin
2020-07-01  7:10   ` Zefan Li
2020-07-01  7:10     ` Zefan Li
2020-07-01  7:10     ` Zefan Li
2020-07-01  7:10     ` Zefan Li
2020-07-03  0:15     ` Nicholas Piggin
2020-07-03  0:15       ` Nicholas Piggin
2020-07-03  0:15       ` Nicholas Piggin
2020-07-20  2:02   ` Zefan Li
2020-07-20  2:02     ` Zefan Li
2020-07-20  2:02     ` Zefan Li
2020-07-20  2:02     ` Zefan Li
2020-07-20  2:49     ` Nicholas Piggin
2020-07-20  2:49       ` Nicholas Piggin
2020-07-20  2:49       ` Nicholas Piggin
2020-04-14  0:27 ` [PATCH v2 0/4] huge " David Rientjes
2020-04-14  0:27   ` David Rientjes
2020-04-14  0:27   ` David Rientjes
2020-04-14  0:27   ` David Rientjes
2020-04-14 12:23   ` Nicholas Piggin [this message]
2020-04-14 12:23     ` Nicholas Piggin
2020-04-14 12:23     ` Nicholas Piggin

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