On Tue 31-05-16 13:35:37, zhouxianrong wrote: > Hey : > the consideration of this patch is that reusing mapping page > rather than allocating a new page for page cache when system be > placed in some states. For lookup pages quickly add a new tag > PAGECACHE_TAG_REUSE for radix tree which tag the pages that is > suitable for reusing. > > A page suitable for reusing within mapping is > 1. clean > 2. map count is zero > 3. whose mapping is evictable Those pages are trivially reclaimable so why should we tag them in a special way? [...] > How to startup the functional > 1. the system is under low memory state and there are fs rw operations > 2. page cache size is get bigger over sysctl limit So is this a form of a page cache limit to trigger the reclaim earlier than on the global memory pressure? -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>