3 ms·

Could you elaborate on the changes for the NVRAM devices that you'd like to see? My understanding is that the 3D XPoint type devices are just exposed as a regu

Could you elaborate on the changes for the NVRAM devices that you'd like to see? My understanding is that the 3D XPoint type devices are just exposed as a regular mmapped device and provide storage which is still a fair bit slower than DRAM, but a lot faster than SSDs.

bluejekyll 10y ago
It's mainly around IO scheduling in the kernel against other processes. This is a good intro paper on some issues: https://homes.cs.washington.edu/~luisceze/publications/novos-hotos2011.pdf https://homes.cs.washington.edu/~luisceze/publications/novos... This discussion is relevant too: https://lwn.net/Articles/547903/ https://lwn.net/Articles/547903/ Those are both a few years, old, but I haven't seen discussion as to the progress made around scheduling when the disks start performing as fast as the CPU load operations. Again, I was just pointing out that I wish that article got into more details around that, b/c I don't know the state of the world, but have some concerns in this particular area and the ability for the kernel to be able to accommodate new scheduling techniques to better utilize the much faster disk access.