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ignore pad argument to malloc_trim per glibc

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The pad argument is only used by the main arena for sbrk in glibc, with
every other page size gap purged with MADV_DONTNEED. It makes more sense
to simply treat it as an ignored legacy parameter rather than trying to
come up with a sensible way to use it for keeping cached free slabs.
This commit is contained in:
Daniel Micay 2018-08-30 09:29:15 -04:00
parent af393afc09
commit 3f80895822
1 changed files with 1 additions and 7 deletions
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8
malloc.c
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@ -981,13 +981,7 @@ EXPORT int h_mallopt(UNUSED int param, UNUSED int value) {
return 0;
}
static const size_t pad_threshold = max_empty_slabs_total * N_SIZE_CLASSES;
EXPORT int h_malloc_trim(size_t pad) {
if (pad > pad_threshold) {
return 0;
}
EXPORT int h_malloc_trim(UNUSED size_t pad) {
if (!is_init()) {
return 0;
}