On Tue, Dec 15, 2015 at 01:38:30AM +0900, Namhyung Kim wrote: > It requires many changes, but basically I also like the split-up since > it's easier to deal with. IIRC there was an opinion (Andi?) regarding > single-file vs multi-file. The file access will be better for single > file so I changed my earlier implementation to use indexed single data > file instead of multiple files.
The page-cache has a lock per inode, so by having all CPUs populate the one file you get contention on that. Also, I suppose you'll have to arbitrate ranges in that file for each cpu to make it work, that too could get you some contention. Having a file per cpu avoids all that. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
