On Thu, Feb 20, 2025 at 04:29:51PM +0100, Vlastimil Babka wrote: > On 2/20/25 16:15, Dave Hansen wrote: > > On 2/19/25 21:20, Byungchul Park wrote: > >> I'm posting the latest version so that anyone can try luf mechanism if > >> wanted by any chance. However, I tagged RFC again because there are > >> still issues that should be resolved to merge to mainline: > > > > I don't see anything fundamentally different here from the last 11 > > versions. I think the entire approach is dangerous and basically makes > > things impossible to debug. It's not clear that some of the failure > > scenarios that I've brought up in the past have actually been fixed. > > Yes, and it's still an invasive change to the buddy allocator. > IIRC at Plumbers the opinion in the audience was that there might be ways to > improve the batching on unmap to reduce the flushes without such an invasive > and potentially dangerous change? Has that been investigated? > I know SJ (CCed) is working on making TLB flush batching work for process_madvise().
