On Tue, 31 May 2022 22:41:12 +0800 Chen Lin wrote: > At 2022-05-31 02:29:18, "Jakub Kicinski" <kuba@xxxxxxxxxx> wrote: > >Oh, well, the reuse also needs an update. We can slap a similar > >condition next to the pfmemalloc check. > > The sample code above cannot completely solve the current problem. > For example, when fragsz is greater than PAGE_FRAG_CACHE_MAX_SIZE(32768), > __page_frag_cache_refill will return a memory of only 32768 bytes, so > should we continue to expand the PAGE_FRAG_CACHE_MAX_SIZE? Maybe more > work needs to be done Right, but I can think of two drivers off the top of my head which will allocate <=32k frags but none which will allocate more.
