On 9/29/26 17:28, Zi Yan wrote: > On 29 Sep 2026, at 9:15, Kiryl Shutsemau wrote: > >> From: "Kiryl Shutsemau (Meta)" <[email protected]> >> >> check_huge_anon() and check_huge_file() open /proc/self/pagemap and >> /proc/kpageflags on every call and read the PMD size from sysfs on top. >> The khugepaged test calls them hundreds of times. >> >> Open both once and keep the descriptors. A pagemap descriptor is tied >> to the mm of the process that opened it, and the khugepaged fork() cases >> call check_huge() from the child, so reopen it when getpid() changes. >> >> Cache the PMD size in read_pmd_pagesize() as well. > > This part might be overlapping with Yeoreum’s another series[1]. > > [1] > https://lore.kernel.org/all/[email protected]/
Yes, let's provide feedback there instead. -- Cheers, David
