On Fri, Jan 15, 2021 at 04:20:13AM -0500, Miaohe Lin wrote: > When gbl_reserve is 0, hugetlb_acct_memory() will do nothing except holding > and releasing hugetlb_lock. We should avoid this unnecessary hugetlb_lock > lock/unlock cycle which is happening on 'most' hugetlb munmap operations by > check delta against 0 at the beginning of hugetlb_acct_memory. > > Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> > Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> I would avoid mentioning gbl_reserve as not all callers use it, and focus on what delta means: "When reservation accounting remains unchanged..", but anyway: Reviewed-by: Oscar Salvador <osalvador@xxxxxxx> -- Oscar Salvador SUSE L3
