Dear Tony, Xishi, > >> How about add some comment, if mirrored memroy is too small, then the > >> normal zone is small, so it may be oom. > >> The mirrored memory is at least 1/64 of whole memory, because struct > >> pages usually take 64 bytes per page. > > > > 1/64th is the absolute lower bound (for the page structures as you say). I > > expect people will need to configure 10% or more to run any real workloads. > > > > I made the memblock boot time allocator fall back to non-mirrored memory > > if mirrored memory ran out. What happens in the run time allocator if the > > non-movable zones run out of pages? Will we allocate kernel pages from movable > > memory? > > > > As I know, the kernel pages will not allocated from movable zone. Yes, kernel pages are not allocated from ZONE_MOVABLE. In this case administrator must review and reconfigure the mirror ratio via "MirrorRequest" EFI variable. Sincerely, Taku Izumi > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > > . > > > > -- 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>