Re: [PATCH v2] sparc64: Trim page tables for 8M hugepages

From	David Miller <davem@davemloft.net>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2] sparc64: Trim page tables for 8M hugepages
Date	2016-07-29 20:10 +0200
Message-ID	<s0kop-8aN-17@gated-at.bofh.it> (permalink)
References	<s0aS6-1HF-33@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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From: Nitin Gupta <nitin.m.gupta@oracle.com>
Date: Fri, 29 Jul 2016 00:54:21 -0700

> For PMD aligned (8M) hugepages, we currently allocate
> all four page table levels which is wasteful. We now
> allocate till PMD level only which saves memory usage
> from page tables.
> 
> Also, when freeing page table for 8M hugepage backed region,
> make sure we don't try to access non-existent PTE level.
> 
> Orabug: 22630259
> 
> Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
> ---
> Changelog v2 vs v1
>  - Combine fix for page table freeing with the main trimming patch (Dave)

Applied, thanks.

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[PATCH v2] sparc64: Trim page tables for 8M hugepages Nitin Gupta <nitin.m.gupta@oracle.com> - 2016-07-29 10:00 +0200
  Re: [PATCH v2] sparc64: Trim page tables for 8M hugepages David Miller <davem@davemloft.net> - 2016-07-29 20:10 +0200

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