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From: Peter Xu <peterx@redhat.com>
To: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Muchun Song <muchun.song@linux.dev>,
	"x86@kernel.org" <x86@kernel.org>,
	Nicholas Piggin <npiggin@gmail.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Matthew Wilcox <willy@infradead.org>,
	"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	Mike Rapoport <rppt@kernel.org>, Jason Gunthorpe <jgg@nvidia.com>,
	"sparclinux@vger.kernel.org" <sparclinux@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()
Date: Wed, 20 Mar 2024 12:09:05 -0400	[thread overview]
Message-ID: <ZfsKIResY4YcxkxK@x1n> (raw)
In-Reply-To: <7ca8f19e-7517-404a-b7bb-92ac516d87c8@csgroup.eu>

On Wed, Mar 20, 2024 at 06:16:43AM +0000, Christophe Leroy wrote:
> At the first place that was to get a close fit between hardware 
> pagetable topology and linux pagetable topology. But obviously we 
> already stepped back for 512k pages, so let's go one more step aside and 
> do similar with 8M pages.
> 
> I'll give it a try and see how it goes.

So you're talking about 8M only for 8xx, am I right?

There seem to be other PowerPC systems use hugepd.  Is it possible that we
convert all hugepd into cont_pte form?

Thanks,

-- 
Peter Xu


WARNING: multiple messages have this Message-ID (diff)
From: Peter Xu <peterx@redhat.com>
To: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Jason Gunthorpe <jgg@nvidia.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	Matthew Wilcox <willy@infradead.org>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	"x86@kernel.org" <x86@kernel.org>,
	Mike Rapoport <rppt@kernel.org>,
	Muchun Song <muchun.song@linux.dev>,
	"sparclinux@vger.kernel.org" <sparclinux@vger.kernel.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Nicholas Piggin <npiggin@gmail.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
	"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>
Subject: Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()
Date: Wed, 20 Mar 2024 12:09:05 -0400	[thread overview]
Message-ID: <ZfsKIResY4YcxkxK@x1n> (raw)
In-Reply-To: <7ca8f19e-7517-404a-b7bb-92ac516d87c8@csgroup.eu>

On Wed, Mar 20, 2024 at 06:16:43AM +0000, Christophe Leroy wrote:
> At the first place that was to get a close fit between hardware 
> pagetable topology and linux pagetable topology. But obviously we 
> already stepped back for 512k pages, so let's go one more step aside and 
> do similar with 8M pages.
> 
> I'll give it a try and see how it goes.

So you're talking about 8M only for 8xx, am I right?

There seem to be other PowerPC systems use hugepd.  Is it possible that we
convert all hugepd into cont_pte form?

Thanks,

-- 
Peter Xu


WARNING: multiple messages have this Message-ID (diff)
From: Peter Xu <peterx@redhat.com>
To: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Jason Gunthorpe <jgg@nvidia.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	Matthew Wilcox <willy@infradead.org>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	"x86@kernel.org" <x86@kernel.org>,
	Mike Rapoport <rppt@kernel.org>,
	Muchun Song <muchun.song@linux.dev>,
	"sparclinux@vger.kernel.org" <sparclinux@vger.kernel.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Nicholas Piggin <npiggin@gmail.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
	"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>
Subject: Re: [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf()
Date: Wed, 20 Mar 2024 12:09:05 -0400	[thread overview]
Message-ID: <ZfsKIResY4YcxkxK@x1n> (raw)
In-Reply-To: <7ca8f19e-7517-404a-b7bb-92ac516d87c8@csgroup.eu>

On Wed, Mar 20, 2024 at 06:16:43AM +0000, Christophe Leroy wrote:
> At the first place that was to get a close fit between hardware 
> pagetable topology and linux pagetable topology. But obviously we 
> already stepped back for 512k pages, so let's go one more step aside and 
> do similar with 8M pages.
> 
> I'll give it a try and see how it goes.

So you're talking about 8M only for 8xx, am I right?

There seem to be other PowerPC systems use hugepd.  Is it possible that we
convert all hugepd into cont_pte form?

Thanks,

-- 
Peter Xu


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2024-03-20 16:10 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-13 21:47 [PATCH 00/13] mm/treewide: Remove pXd_huge() API peterx
2024-03-13 21:47 ` peterx
2024-03-13 21:47 ` peterx
2024-03-13 21:47 ` [PATCH 01/13] mm/hmm: Process pud swap entry without pud_huge() peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47 ` [PATCH 02/13] mm/gup: Cache p4d in follow_p4d_mask() peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47 ` [PATCH 03/13] mm/gup: Check p4d presence before going on peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47 ` [PATCH 04/13] mm/x86: Change pXd_huge() behavior to exclude swap entries peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47 ` [PATCH 05/13] mm/sparc: " peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47 ` [PATCH 06/13] mm/arm: Use macros to define pmd/pud helpers peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47 ` [PATCH 07/13] mm/arm: Redefine pmd_huge() with pmd_leaf() peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47 ` [PATCH 08/13] mm/arm64: Merge pXd_huge() and pXd_leaf() definitions peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47 ` [PATCH 09/13] mm/powerpc: Redefine pXd_huge() with pXd_leaf() peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-14  8:45   ` Christophe Leroy
2024-03-14  8:45     ` Christophe Leroy
2024-03-14  8:45     ` Christophe Leroy
2024-03-14 12:53     ` Peter Xu
2024-03-14 12:53       ` Peter Xu
2024-03-14 12:53       ` Peter Xu
2024-03-14 13:11       ` Christophe Leroy
2024-03-14 13:11         ` Christophe Leroy
2024-03-14 13:11         ` Christophe Leroy
2024-03-18 16:15         ` Jason Gunthorpe
2024-03-18 16:15           ` Jason Gunthorpe
2024-03-18 16:15           ` Jason Gunthorpe
2024-03-19 23:07           ` Christophe Leroy
2024-03-19 23:07             ` Christophe Leroy
2024-03-19 23:07             ` Christophe Leroy
2024-03-19 23:26             ` Jason Gunthorpe
2024-03-19 23:26               ` Jason Gunthorpe
2024-03-19 23:26               ` Jason Gunthorpe
2024-03-20  6:16               ` Christophe Leroy
2024-03-20  6:16                 ` Christophe Leroy
2024-03-20  6:16                 ` Christophe Leroy
2024-03-20 16:09                 ` Peter Xu [this message]
2024-03-20 16:09                   ` Peter Xu
2024-03-20 16:09                   ` Peter Xu
2024-03-20 17:40                   ` Christophe Leroy
2024-03-20 17:40                     ` Christophe Leroy
2024-03-20 17:40                     ` Christophe Leroy
2024-03-20 20:24                     ` Peter Xu
2024-03-20 20:24                       ` Peter Xu
2024-03-20 20:24                       ` Peter Xu
2024-03-13 21:47 ` [PATCH 10/13] mm/gup: Merge pXd huge mapping checks peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47 ` [PATCH 11/13] mm/treewide: Replace pXd_huge() with pXd_leaf() peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-14  8:50   ` Christophe Leroy
2024-03-14  8:50     ` Christophe Leroy
2024-03-14  8:50     ` Christophe Leroy
2024-03-14 12:59     ` Peter Xu
2024-03-14 12:59       ` Peter Xu
2024-03-14 12:59       ` Peter Xu
2024-03-18 16:16       ` Jason Gunthorpe
2024-03-18 16:16         ` Jason Gunthorpe
2024-03-18 16:16         ` Jason Gunthorpe
2024-03-13 21:47 ` [PATCH 12/13] mm/treewide: Remove pXd_huge() peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx
2024-03-14  8:56   ` Christophe Leroy
2024-03-14  8:56     ` Christophe Leroy
2024-03-14  8:56     ` Christophe Leroy
2024-03-14 14:08     ` Peter Xu
2024-03-14 14:08       ` Peter Xu
2024-03-14 14:08       ` Peter Xu
2024-03-13 21:47 ` [PATCH 13/13] mm: Document pXd_leaf() API peterx
2024-03-13 21:47   ` peterx
2024-03-13 21:47   ` peterx

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