Resend with new e-mail for Naoya On 6/7/21 7:16 AM, wangbin wrote: > From: Bin Wang <wangbin224@xxxxxxxxxx> > > In the current hugetlbfs memory failure handler, reserved huge page > counts are used to record the number of huge pages with hwposion. I do not believe this is an accurate statement. Naoya is the memory error expert and may disagree, but I do not see anywhere where reserve counts are being used to track huge pages with memory errors. IIUC, the routine hugetlbfs_error_remove_page is called after unmapping the page from all user mappings. The routine will simply, remove the page from the cache. This effectively removes the page from the file as hugetlbfs is a memory only filesystem. The subsequent call to hugetlb_unreserve_pages cleans up any reserve map entries associated with the page and adjusts the reserve count if necessary. The reserve count adjustment is based on removing the page from the file, rather than the memory error. The same adjustment would be made if the page was hole punched from the file. What specific problem are you trying to solve? Are trying to see how many huge pages were hit by memory errors? -- Mike Kravetz
