linux-kernel - Re: [PATCH 03/12] mm, thp, tmpfs: handle huge page cases in shmem_getpage

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Message-ID: <CACz4_2fcnV6UQQU9pKu0cF0MTzC7wu+X_swvyOwmgw0sTxZWWA@mail.gmail.com>
Date:	Wed, 16 Oct 2013 10:50:17 -0700
From:	Ning Qu <quning@...gle.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	Hillf Danton <dhillf@...il.com>, Dave Hansen <dave@...1.net>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/12] mm, thp, tmpfs: handle huge page cases in shmem_getpage_gfp

Great! Thanks!
Best wishes,
-- 
Ning Qu (曲宁) | Software Engineer | quning@...gle.com | +1-408-418-6066


On Wed, Oct 16, 2013 at 5:11 AM, Kirill A. Shutemov
<kirill.shutemov@...ux.intel.com> wrote:
> Ning Qu wrote:
>> you mean something like this? If so, then fixed.
>>
>>                if (must_use_thp) {
>>                         page = shmem_alloc_hugepage(gfp, info, index);
>>                         if (page) {
>>                                 count_vm_event(THP_WRITE_ALLOC);
>>                         } else
>>                                 count_vm_event(THP_WRITE_ALLOC_FAILED);
>>                 } else {
>>                         page = shmem_alloc_page(gfp, info, index);
>>                 }
>>
>>                 if (!page) {
>>                         error = -ENOMEM;
>>                         goto unacct;
>>                 }
>>                 nr = hpagecache_nr_pages(page);
>
> Yeah.
>
> count_vm_event() part still looks ugly, but I have similar in my code.
> I'll think more how to rework in to make it better.
>
> --
>  Kirill A. Shutemov
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