On Thu, May 30, 2024 at 06:50:48AM -0700, Dave Hansen wrote: > On 5/30/24 01:41, Byungchul Park wrote: > > LUF should not optimize tlb flushes for mappings that users explicitly > > change e.g. through mmap() and munmap(). > > We are thoroughly going around in circles at this point. > > I'm not quite sure what to do. Ying and I see a problem that we've > tried to explain a couple of times. We've tried to show the connection > between a LUF-elided TLB flush and how that could affect a later > munmap() or mmap(MAP_FIXED). > > But these responses seem to keep going back to the fact that LUF doesn't I just wanted to understand exactly what Ying meant. My answer might be done in a wrong way if I wrongly got him. > directly affect munmap(), which is true, but quite irrelevant to the > problem being described. > > So we're at an impasse. > > Byungchul, perhaps you should spin another series and maybe Ying and I I don't think the current implementation is perfect. I just wanted to know what I'm missing now but.. yes. It would be much better to communicate with a real bug if existing. I will respin the next version shortly. Byungchul > have to write up a test case to show the bug that we see. Or perhaps > someone else can jump into the thread and bridge the communication gap.
