From: Matthew Wilcox <willy@infradead.org>
To: Alexander Duyck <alexander.duyck@gmail.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>,
netdev@vger.kernel.org, linux-mm@kvack.org,
Jesper Dangaard Brouer <brouer@redhat.com>,
Eric Dumazet <eric.dumazet@gmail.com>
Subject: [PATCH v2 5/8] page_frag_cache: Save memory on small machines
Date: Thu, 22 Mar 2018 08:31:54 -0700 [thread overview]
Message-ID: <20180322153157.10447-6-willy@infradead.org> (raw)
In-Reply-To: <20180322153157.10447-1-willy@infradead.org>
From: Matthew Wilcox <mawilcox@microsoft.com>
Only allocate a single page if CONFIG_BASE_SMALL is set.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
---
include/linux/mm_types.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index a63b138ad1a4..0defff9e3c0e 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -216,7 +216,11 @@ struct page {
#endif
} _struct_page_alignment;
+#if CONFIG_BASE_SMALL
+#define PAGE_FRAG_CACHE_MAX_SIZE PAGE_SIZE
+#else
#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK)
+#endif
#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE)
#define PFC_MEMALLOC (1U << 31)
--
2.16.2
next prev parent reply other threads:[~2018-03-22 15:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-22 15:31 [PATCH v2 0/8] page_frag_cache improvements Matthew Wilcox
2018-03-22 15:31 ` [PATCH v2 1/8] page_frag_cache: Remove pfmemalloc bool Matthew Wilcox
2018-03-22 16:39 ` Alexander Duyck
2018-03-22 17:08 ` Matthew Wilcox
2018-03-22 15:31 ` [PATCH v2 2/8] page_frag_cache: Move slowpath code from page_frag_alloc Matthew Wilcox
2018-03-22 15:31 ` [PATCH v2 3/8] page_frag_cache: Rename 'nc' to 'pfc' Matthew Wilcox
2018-03-22 15:31 ` [PATCH v2 4/8] page_frag_cache: Rename fragsz to size Matthew Wilcox
2018-03-22 15:31 ` Matthew Wilcox [this message]
2018-03-22 15:31 ` [PATCH v2 6/8] page_frag_cache: Use a mask instead of offset Matthew Wilcox
2018-03-22 16:22 ` Alexander Duyck
2018-03-22 16:41 ` Matthew Wilcox
2018-03-22 17:31 ` Alexander Duyck
2018-03-22 17:34 ` Matthew Wilcox
2018-03-22 15:31 ` [PATCH v2 7/8] page_frag: Update documentation Matthew Wilcox
2018-03-22 15:31 ` [PATCH v2 8/8] page_frag: Account allocations Matthew Wilcox
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