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plat: don't give up on hugetlb fail

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some free memory might appear over time
This commit is contained in:
notaz 2013-03-14 00:19:42 +02:00
parent cceadf4cd4
commit f4750ef3f5
1 changed files with 8 additions and 6 deletions
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14
linux/plat.c
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@ -137,7 +137,7 @@ int plat_wait_event(int *fds_hnds, int count, int timeout_ms)
void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
{ {
static int hugetlb_disabled; static int hugetlb_warned;
int prot = PROT_READ | PROT_WRITE; int prot = PROT_READ | PROT_WRITE;
int flags = MAP_PRIVATE | MAP_ANONYMOUS; int flags = MAP_PRIVATE | MAP_ANONYMOUS;
void *req, *ret; void *req, *ret;
@ -147,15 +147,17 @@ void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
prot |= PROT_EXEC; prot |= PROT_EXEC;
if (is_fixed) if (is_fixed)
flags |= MAP_FIXED; flags |= MAP_FIXED;
if (size >= HUGETLB_THRESHOLD && !hugetlb_disabled) if (size >= HUGETLB_THRESHOLD)
flags |= MAP_HUGETLB; flags |= MAP_HUGETLB;
ret = mmap(req, size, prot, flags, -1, 0); ret = mmap(req, size, prot, flags, -1, 0);
if (ret == MAP_FAILED && (flags & MAP_HUGETLB)) { if (ret == MAP_FAILED && (flags & MAP_HUGETLB)) {
fprintf(stderr, if (!hugetlb_warned) {
"warning: failed to do hugetlb mmap (%p, %zu): %d\n", fprintf(stderr,
req, size, errno); "warning: failed to do hugetlb mmap (%p, %zu): %d\n",
hugetlb_disabled = 1; req, size, errno);
hugetlb_warned = 1;
}
flags &= ~MAP_HUGETLB; flags &= ~MAP_HUGETLB;
ret = mmap(req, size, prot, flags, -1, 0); ret = mmap(req, size, prot, flags, -1, 0);
} }