Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1507869

[PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if huge page cache enabled

From "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Newsgroups linux.kernel
Subject [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if huge page cache enabled
Date 2016-10-25 02:30 +0200
Message-ID <svXMR-6y6-1@gated-at.bofh.it> (permalink)
References <svXDb-6uQ-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

We are going to do IO a huge page a time. So we need BIO_MAX_PAGES to be
at least HPAGE_PMD_NR. For x86-64, it's 512 pages.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 block/bio.c         | 3 ++-
 include/linux/bio.h | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/block/bio.c b/block/bio.c
index db85c5753a76..a69062bda3e0 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -44,7 +44,8 @@
  */
 #define BV(x) { .nr_vecs = x, .name = "biovec-"__stringify(x) }
 static struct biovec_slab bvec_slabs[BVEC_POOL_NR] __read_mostly = {
-	BV(1), BV(4), BV(16), BV(64), BV(128), BV(BIO_MAX_PAGES),
+	BV(1), BV(4), BV(16), BV(64), BV(128),
+	{ .nr_vecs = BIO_MAX_PAGES, .name ="biovec-max_pages" },
 };
 #undef BV
 
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 97cb48f03dc7..19d0fae9cdd0 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -38,7 +38,11 @@
 #define BIO_BUG_ON
 #endif
 
+#ifdef CONFIG_TRANSPARENT_HUGE_PAGECACHE
+#define BIO_MAX_PAGES		(HPAGE_PMD_NR > 256 ? HPAGE_PMD_NR : 256)
+#else
 #define BIO_MAX_PAGES		256
+#endif
 
 #define bio_prio(bio)			(bio)->bi_ioprio
 #define bio_set_prio(bio, prio)		((bio)->bi_ioprio = prio)
-- 
2.9.3

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCHv4 00/43] ext4: support of huge pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 02/43] radix tree test suite: Allow GFP_ATOMIC allocations to fail "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 34/43] ext4: handle huge pages in __ext4_block_zero_page_range() "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 26/43] fs: make block_page_mkwrite() aware about huge pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 40/43] ext4: fix SEEK_DATA/SEEK_HOLE for huge pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 42/43] mm, fs, ext4: expand use of page_mapping() and page_to_pgoff() "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 41/43] ext4: make fallocate() operations work with huge pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 09/43] mm, rmap: account file thp pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 35/43] ext4: make ext4_block_write_begin() aware about huge pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 06/43] mm, shmem: swich huge tmpfs to multi-order radix-tree entries "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 36/43] ext4: handle huge pages in ext4_da_write_end() "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 10/43] thp: try to free page's buffers before attempt split "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 11/43] thp: handle write-protection faults for file THP "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:20 +0200
  [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if huge page cache enabled "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
    Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if  huge page cache enabled Christoph Hellwig <hch@infradead.org> - 2016-10-25 09:30 +0200
      Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if  huge page cache enabled "Kirill A. Shutemov" <kirill@shutemov.name> - 2016-10-26 00:40 +0200
        Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if huge page cache enabled Andreas Dilger <adilger@dilger.ca> - 2016-10-26 06:20 +0200
          Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if  huge page cache enabled Ming Lei <tom.leiming@gmail.com> - 2016-10-26 09:40 +0200
            Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if  huge page cache enabled Christoph Hellwig <hch@infradead.org> - 2016-10-26 09:40 +0200
          Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if  huge page cache enabled Christoph Hellwig <hch@infradead.org> - 2016-10-26 09:40 +0200
        Re: [PATCHv4 18/43] block: define BIO_MAX_PAGES to HPAGE_PMD_NR if  huge page cache enabled Christoph Hellwig <hch@infradead.org> - 2016-10-26 09:40 +0200
  [PATCHv4 30/43] mm: account huge pages to dirty, writaback, reclaimable, etc. "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 31/43] ext4: make ext4_mpage_readpages() hugepage-aware "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 17/43] HACK: readahead: alloc huge pages, if allowed "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 20/43] mm: make write_cache_pages() work on huge pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 21/43] thp: introduce hpage_size() and hpage_mask() "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 01/43] tools: Add WARN_ON_ONCE "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 08/43] page-flags: relax page flag policy for few flags "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 39/43] ext4: make EXT4_IOC_MOVE_EXT work with huge pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 32/43] ext4: make ext4_writepage() work on huge pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 13/43] filemap: allocate huge page in page_cache_read(), if allowed "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 28/43] truncate: make invalidate_inode_pages2_range() aware about huge pages "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 03/43] radix-tree: Add radix_tree_join "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 15/43] filemap: allocate huge page in pagecache_get_page(), if allowed "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 29/43] mm, hugetlb: switch hugetlbfs to multi-order radix-tree entries "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 23/43] thp: make thp_get_unmapped_area() respect S_HUGE_MODE "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200
  [PATCHv4 24/43] fs: make block_read_full_page() be able to read huge page "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-10-25 02:30 +0200

csiph-web