do_readahead() requires a_ops->readpage to be != NULL:
568 static ssize_t
569 do_readahead(struct address_space *mapping, struct file *filp,
570 pgoff_t index, unsigned long nr)
571 {
572 if (!mapping || !mapping->a_ops || !mapping->a_ops->readpage)
573 return -EINVAL;
574
575 force_page_cache_readahead(mapping, filp, index, nr);
576 return 0;
577 }
but following commit removed readpage from hugetlbfs:
commit f2deae9d4e70793568ef9e85d227abb7bef5b622
Author: Mel Gorman <m...@csn.ul.ie>
Date: Wed May 13 15:56:10 2009 +0100
Remove implementation of readpage from the hugetlbfs_aops
So this is going to always return EINVAL on patched kernels.
Ignore return value, regardless of readahead() outcome testcase
will still check if reservation counter gets corrupted.
Signed-off-by: Jan Stancek <jstan...@redhat.com>
---
tests/readahead_reserve.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/tests/readahead_reserve.c b/tests/readahead_reserve.c
index d0a478b..068b6f4 100644
--- a/tests/readahead_reserve.c
+++ b/tests/readahead_reserve.c
@@ -64,8 +64,7 @@ int main(int argc, char *argv[])
verbose_printf("Reserve count after map: %lu\n", map_rsvd);
/* readahead the region and record reservations */
- if (readahead(fd, 0, hpage_size) == -1)
- FAIL("readahead(): %s", strerror(errno));
+ readahead(fd, 0, hpage_size);
readahead_rsvd = get_huge_page_counter(hpage_size, HUGEPAGES_RSVD);
verbose_printf("Reserve count after readahead: %lu\n", readahead_rsvd);
--
1.7.1
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