From: Baolin Wang <baolin.wang@linux.alibaba.com>
To: Dave Hansen <dave.hansen@intel.com>, akpm@linux-foundation.org
Cc: rppt@linux.ibm.com, willy@infradead.org, will@kernel.org,
aneesh.kumar@linux.ibm.com, npiggin@gmail.com,
peterz@infradead.org, catalin.marinas@arm.com,
chenhuacai@kernel.org, kernel@xen0n.name,
tsbogend@alpha.franken.de, dave.hansen@linux.intel.com,
luto@kernel.org, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, hpa@zytor.com, arnd@arndb.de, guoren@kernel.org,
monstr@monstr.eu, jonas@southpole.se,
stefan.kristiansson@saunalahti.fi, shorne@gmail.com,
x86@kernel.org, linux-arch@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev,
linux-mips@vger.kernel.org, linux-csky@vger.kernel.org,
openrisc@lists.librecores.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] Add PUD and kernel PTE level pagetable account
Date: Thu, 7 Jul 2022 19:32:44 +0800 [thread overview]
Message-ID: <ef376131-bf5f-7e5b-ea1b-1e8f64a6d060@linux.alibaba.com> (raw)
In-Reply-To: <d2d58cc2-7e6d-aa2d-3096-a500ce321494@intel.com>
On 7/6/2022 11:48 PM, Dave Hansen wrote:
> On 7/6/22 01:59, Baolin Wang wrote:
>> Now we will miss to account the PUD level pagetable and kernel PTE level
>> pagetable, as well as missing to set the PG_table flags for these pagetable
>> pages, which will get an inaccurate pagetable accounting, and miss
>> PageTable() validation in some cases. So this patch set introduces new
>> helpers to help to account PUD and kernel PTE pagetable pages.
>
> Could you explain the motivation for this series a bit more? Is there a
> real-world problem that this fixes?
Not fix real problem. The motivation is that making the pagetable
accounting more accurate, which helps us to analyse the consumption of
the pagetable pages in some cases, and maybe help to do some empty
pagetable reclaiming in future.
next prev parent reply other threads:[~2022-07-07 11:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-06 8:59 [PATCH 0/3] Add PUD and kernel PTE level pagetable account Baolin Wang
2022-07-06 8:59 ` [PATCH 1/3] mm: Factor out the pagetable pages account into new helper function Baolin Wang
2022-07-06 8:59 ` [PATCH 2/3] mm: Add PUD level pagetable account Baolin Wang
2022-07-06 8:59 ` [PATCH 3/3] mm: Add kernel PTE level pagetable pages account Baolin Wang
2022-07-06 15:45 ` Matthew Wilcox
2022-07-07 11:45 ` Baolin Wang
2022-07-06 15:48 ` [PATCH 0/3] Add PUD and kernel PTE level pagetable account Dave Hansen
2022-07-07 11:32 ` Baolin Wang [this message]
2022-07-07 14:44 ` Dave Hansen
2022-07-10 11:19 ` Baolin Wang
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