From: Matthew Wilcox <willy@infradead.org>
To: Yin Fengwei <fengwei.yin@intel.com>
Cc: david@redhat.com, linux-mm@kvack.org, dave.hansen@intel.com,
tim.c.chen@intel.com, ying.huang@intel.com
Subject: Re: [RFC PATCH v3 1/4] filemap: add function filemap_map_folio_range()
Date: Fri, 3 Feb 2023 13:53:20 +0000 [thread overview]
Message-ID: <Y90R0FIQpOC7Gs/J@casper.infradead.org> (raw)
In-Reply-To: <20230203131636.1648662-2-fengwei.yin@intel.com>
On Fri, Feb 03, 2023 at 09:16:33PM +0800, Yin Fengwei wrote:
> filemap_map_folio_range() maps partial/full folio. Comparing to
> original filemap_map_pages(), it batched updates refcount and
> get minor performance improvement for large folio.
>
> a self cooked will-it-scale.page_fault3 like app (change file
> write fault to read fault) with xfs filesystem got 2% performance
> gain.
Please delete folio_more_pages() as part of this patch; this was the
only caller.
> + ret |= filemap_map_folio_range(vmf, folio,
> + xas.xa_index - folio->index, addr, nr_pages);
Sorry to nitpick, but there's an extra space between |= and
filemap_map_folio_range() here.
next prev parent reply other threads:[~2023-02-03 13:53 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-03 13:16 [RFC PATCH v3 0/4] folio based filemap_map_pages() Yin Fengwei
2023-02-03 13:16 ` [RFC PATCH v3 1/4] filemap: add function filemap_map_folio_range() Yin Fengwei
2023-02-03 13:53 ` Matthew Wilcox [this message]
2023-02-04 3:25 ` Yin, Fengwei
2023-02-03 14:17 ` Kirill A. Shutemov
2023-02-04 3:31 ` Yin, Fengwei
2023-02-03 13:16 ` [RFC PATCH v3 2/4] rmap: add folio_add_file_rmap_range() Yin Fengwei
2023-02-03 14:02 ` Matthew Wilcox
2023-02-04 3:34 ` Yin, Fengwei
2023-02-03 14:19 ` Kirill A. Shutemov
2023-02-04 3:35 ` Yin, Fengwei
2023-02-03 13:16 ` [RFC PATCH v3 3/4] mm: add do_set_pte_range() Yin Fengwei
2023-02-03 13:25 ` David Hildenbrand
2023-02-03 13:30 ` Yin, Fengwei
2023-02-03 13:34 ` David Hildenbrand
2023-02-03 13:39 ` Yin, Fengwei
2023-02-03 13:32 ` Chih-En Lin
2023-02-03 13:38 ` Yin, Fengwei
2023-02-03 14:30 ` Chih-En Lin
2023-02-04 5:47 ` Yin, Fengwei
2023-02-03 13:16 ` [RFC PATCH v3 4/4] filemap: batched update mm counter,rmap when map file folio Yin Fengwei
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