On Thu, Feb 01, 2018 at 08:59:18PM +0200, Boaz Harrosh wrote: > On 01/02/18 20:34, Chuck Lever wrote: <> > > This work was also presented at the SNIA Persistent Memory Summit > > last week. The use case of course is providing a user space > > platform for the development and deployment of memory-based file > > systems. The value-add of this kind of file system is ultra-low > > latency, which is a challenge for the current most popular such > > framework, FUSE. > > > > To start, I can think of three areas where specific questions might > > be entertained by LSF/MM attendees: > > > > - Spectre mitigations make this whole "user space filesystem" > > arrangement even slower, thanks to additional context switches > > between user space and the kernel. I think you're referring to the KPTI patches, which address Meltdown, not Spectre. > What about a different interface for a "trusted" binary with "Spectre > mitigation" off. I know Redhat guys have a project where they want to > sign and verify by Kernel all systemd /sbin/* binaries. If these > binaries have such an hardened trust could we make them faster? (ie > back to regular speed) I don't think that helps. --b.
