From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH v3] ARC: mm: remove __ARCH_USE_5LEVEL_HACK
Date: Thu, 10 Oct 2019 11:28:03 +0300 [thread overview]
Message-ID: <20191010082803.biaon6gq7yxvrvrq@black.fi.intel.com> (raw)
In-Reply-To: <20191009185731.25814-1-vgupta@synopsys.com>
On Wed, Oct 09, 2019 at 06:57:31PM +0000, Vineet Gupta wrote:
> Add the intermediate p4d accessors to make it 5 level compliant.
>
> This is a non-functional change anyways since ARC has software page walker
> with 2 lookup levels (pgd -> pte)
>
> There is slight code bloat due to pulling in needless p*d_free_tlb()
> macros which needs to be addressed seperately.
>
> | bloat-o-meter2 vmlinux-with-5LEVEL_HACK vmlinux-patched
> | add/remove: 0/0 grow/shrink: 2/0 up/down: 128/0 (128)
> | function old new delta
> | free_pgd_range 546 656 +110
> | p4d_clear_bad 2 20 +18
> | Total: Before=4137148, After=4137276, chg 0.000000%
>
> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
--
Kirill A. Shutemov
next prev parent reply other threads:[~2019-10-10 8:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-08 21:38 [PATCH] ARC: mm: remove __ARCH_USE_5LEVEL_HACK Vineet Gupta
2019-10-08 23:42 ` Kirill A. Shutemov
2019-10-09 18:38 ` Vineet Gupta
2019-10-09 18:43 ` [PATCH v2] " Vineet Gupta
2019-10-09 18:57 ` [PATCH v3] " Vineet Gupta
2019-10-10 8:28 ` Kirill A. Shutemov [this message]
2019-10-22 15:23 ` Mike Rapoport
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