tree: git://git.cmpxchg.org/linux-mmotm.git master
head: 1ceb98996d2504dd4e0bcb5f4cb9009a18cd8aaa
commit: c714f7da3636f838c8ed46c7c477525c2ea98a0f [149/256] mm, migrate: remove reason argument from new_page_t
config: x86_64-lkp (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
git checkout c714f7da3636f838c8ed46c7c477525c2ea98a0f
# save the attached .config to linux build tree
make ARCH=x86_64
All errors (new ones prefixed by >>):
mm/migrate.c: In function 'migrate_misplaced_page':
>> mm/migrate.c:1920:46: error: passing argument 2 of 'migrate_pages' from incompatible pointer type [-Werror=incompatible-pointer-types]
nr_remaining = migrate_pages(&migratepages, alloc_misplaced_dst_page,
^~~~~~~~~~~~~~~~~~~~~~~~
mm/migrate.c:1364:5: note: expected 'struct page * (*)(struct page *, long unsigned int)' but argument is of type 'struct page * (*)(struct page *, long unsigned int, int **)'
int migrate_pages(struct list_head *from, new_page_t get_new_page,
^~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/migrate_pages +1920 mm/migrate.c
de466bd6 Mel Gorman 2013-12-18 1885
b32967ff Mel Gorman 2012-11-19 1886 /*
b32967ff Mel Gorman 2012-11-19 1887 * Attempt to migrate a misplaced page to the specified destination
b32967ff Mel Gorman 2012-11-19 1888 * node. Caller is expected to have an elevated reference count on
b32967ff Mel Gorman 2012-11-19 1889 * the page that will be dropped by this function before returning.
b32967ff Mel Gorman 2012-11-19 1890 */
1bc115d8 Mel Gorman 2013-10-07 1891 int migrate_misplaced_page(struct page *page, struct vm_area_struct *vma,
1bc115d8 Mel Gorman 2013-10-07 1892 int node)
b32967ff Mel Gorman 2012-11-19 1893 {
b32967ff Mel Gorman 2012-11-19 1894 pg_data_t *pgdat = NODE_DATA(node);
340ef390 Hugh Dickins 2013-02-22 1895 int isolated;
7039e1db Peter Zijlstra 2012-10-25 1896 int nr_remaining;
b32967ff Mel Gorman 2012-11-19 1897 LIST_HEAD(migratepages);
b32967ff Mel Gorman 2012-11-19 1898
b32967ff Mel Gorman 2012-11-19 1899 /*
1bc115d8 Mel Gorman 2013-10-07 1900 * Don't migrate file pages that are mapped in multiple processes
1bc115d8 Mel Gorman 2013-10-07 1901 * with execute permissions as they are probably shared libraries.
b32967ff Mel Gorman 2012-11-19 1902 */
1bc115d8 Mel Gorman 2013-10-07 1903 if (page_mapcount(page) != 1 && page_is_file_cache(page) &&
1bc115d8 Mel Gorman 2013-10-07 1904 (vma->vm_flags & VM_EXEC))
b32967ff Mel Gorman 2012-11-19 1905 goto out;
7039e1db Peter Zijlstra 2012-10-25 1906
b32967ff Mel Gorman 2012-11-19 1907 /*
b32967ff Mel Gorman 2012-11-19 1908 * Rate-limit the amount of data that is being migrated to a node.
b32967ff Mel Gorman 2012-11-19 1909 * Optimal placement is no good if the memory bus is saturated and
b32967ff Mel Gorman 2012-11-19 1910 * all the time is being spent migrating!
b32967ff Mel Gorman 2012-11-19 1911 */
340ef390 Hugh Dickins 2013-02-22 1912 if (numamigrate_update_ratelimit(pgdat, 1))
b32967ff Mel Gorman 2012-11-19 1913 goto out;
b32967ff Mel Gorman 2012-11-19 1914
b32967ff Mel Gorman 2012-11-19 1915 isolated = numamigrate_isolate_page(pgdat, page);
b32967ff Mel Gorman 2012-11-19 1916 if (!isolated)
b32967ff Mel Gorman 2012-11-19 1917 goto out;
b32967ff Mel Gorman 2012-11-19 1918
b32967ff Mel Gorman 2012-11-19 1919 list_add(&page->lru, &migratepages);
9c620e2b Hugh Dickins 2013-02-22 @1920 nr_remaining = migrate_pages(&migratepages, alloc_misplaced_dst_page,
68711a74 David Rientjes 2014-06-04 1921 NULL, node, MIGRATE_ASYNC,
68711a74 David Rientjes 2014-06-04 1922 MR_NUMA_MISPLACED);
7039e1db Peter Zijlstra 2012-10-25 1923 if (nr_remaining) {
59c82b70 Joonsoo Kim 2014-01-21 1924 if (!list_empty(&migratepages)) {
59c82b70 Joonsoo Kim 2014-01-21 1925 list_del(&page->lru);
599d0c95 Mel Gorman 2016-07-28 1926 dec_node_page_state(page, NR_ISOLATED_ANON +
59c82b70 Joonsoo Kim 2014-01-21 1927 page_is_file_cache(page));
59c82b70 Joonsoo Kim 2014-01-21 1928 putback_lru_page(page);
59c82b70 Joonsoo Kim 2014-01-21 1929 }
7039e1db Peter Zijlstra 2012-10-25 1930 isolated = 0;
03c5a6e1 Mel Gorman 2012-11-02 1931 } else
03c5a6e1 Mel Gorman 2012-11-02 1932 count_vm_numa_event(NUMA_PAGE_MIGRATE);
7039e1db Peter Zijlstra 2012-10-25 1933 BUG_ON(!list_empty(&migratepages));
7039e1db Peter Zijlstra 2012-10-25 1934 return isolated;
340ef390 Hugh Dickins 2013-02-22 1935
340ef390 Hugh Dickins 2013-02-22 1936 out:
340ef390 Hugh Dickins 2013-02-22 1937 put_page(page);
340ef390 Hugh Dickins 2013-02-22 1938 return 0;
7039e1db Peter Zijlstra 2012-10-25 1939 }
220018d3 Mel Gorman 2012-12-05 1940 #endif /* CONFIG_NUMA_BALANCING */
b32967ff Mel Gorman 2012-11-19 1941
:::::: The code at line 1920 was first introduced by commit
:::::: 9c620e2bc5aa4256c102ada34e6c76204ed5898b mm: remove offlining arg to migrate_pages
:::::: TO: Hugh Dickins <hughd@xxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
---
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