Hello Mel Gorman,
The patch 290d1a3ce0ec: "mm: page_alloc: avoid marking zones full
prematurely after zone_reclaim()" from Mar 23, 2013, leads to the
following warning:
"mm/page_alloc.c:1957 get_page_from_freelist()
warn: bitwise AND condition is false here"
mm/page_alloc.c
1948 /*
1949 * Failed to reclaim enough to meet watermark.
1950 * Only mark the zone full if checking the min
1951 * watermark or if we failed to reclaim just
1952 * 1<<order pages or else the page allocator
1953 * fastpath will prematurely mark zones full
1954 * when the watermark is between the low and
1955 * min watermarks.
1956 */
1957 if ((alloc_flags & ALLOC_WMARK_MIN) ||
^^^^^^^^^^^^^^^
This is zero.
1958 ret == ZONE_RECLAIM_SOME)
1959 goto this_zone_full;
[snip]
2333 static inline int
2334 gfp_to_alloc_flags(gfp_t gfp_mask)
2335 {
2336 int alloc_flags = ALLOC_WMARK_MIN | ALLOC_CPUSET;
^^^^^^^^^^^^^^^
2337 const gfp_t wait = gfp_mask & __GFP_WAIT;
regards,
dan carpenter
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