When the user specifies too many hugepages or an invalid
default_hugepagesz the communication to the user is implicit in the
allocation message. This patch adds a warning when the desired page
count is not allocated and prints an error when the default_hugepagesz
is invalid on boot.
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
mm/hugetlb.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e5828875f7bb..6de30bbac23e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -70,6 +70,7 @@ struct mutex *hugetlb_fault_mutex_table ____cacheline_aligned_in_smp;
/* Forward declaration */
static int hugetlb_acct_memory(struct hstate *h, long delta);
+static char * __init memfmt(char *buf, unsigned long n);
static inline void unlock_or_release_subpool(struct hugepage_subpool *spool)
{
@@ -2189,7 +2190,14 @@ static void __init hugetlb_hstate_alloc_pages(struct hstate *h)
&node_states[N_MEMORY]))
break;
}
- h->max_huge_pages = i;
+ if (i < h->max_huge_pages) {
+ char buf[32];
+
+ memfmt(buf, huge_page_size(h)),
+ pr_warn("HugeTLB: allocating %lu of page size %s failed. Only allocated %lu hugepages.\n",
+ h->max_huge_pages, buf, i);
+ h->max_huge_pages = i;
+ }
}
static void __init hugetlb_init_hstates(void)
@@ -2785,6 +2793,11 @@ static int __init hugetlb_init(void)
return 0;
if (!size_to_hstate(default_hstate_size)) {
+ if (default_hstate_size != 0) {
+ pr_err("HugeTLB: unsupported default_hugepagesz %lu. Reverting to %lu\n",
+ default_hstate_size, HPAGE_SIZE);
+ }
+
default_hstate_size = HPAGE_SIZE;
if (!size_to_hstate(default_hstate_size))
hugetlb_add_hstate(HUGETLB_PAGE_ORDER);
--
2.13.0.92.gcd65a7235
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