On Mon, Sep 06, 2021 at 01:09:22PM +0100, Matthew Wilcox wrote: > On Mon, Sep 06, 2021 at 04:16:13PM +0000, Huang Shijie wrote: > > This patch adds AT_NUMA_REPLICATION for execveat(). > > > > If this flag is set, the kernel will trigger COW(copy on write) > > on the mmapped ELF binary. So the program will have a copied-page > > on its NUMA node, even if the original page in page cache is > > on other NUMA nodes. > > This does absolutely nothing for programs which run on multiple NUMA > nodes at the same time. Yes. Not suit for that case (Mysql database..). > > Also, I dislike the abuse of the term "COW" for this. It's COF -- > Copy On Fault. Maybe it is better to add new flags "NUMA_REPLICATION" in mmap(). :) Thanks Huang Shijie
