[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] QLogic Fibre Channel HBA Support
> No proof whether I was hitting another entropy bug or just > workload. (Reminder to lurkers -- I'm running 1.2 with /dev/random > major,minor set to 1,9 -- same as /dev/urandom.) If you temporarily run out of entropy, it should only ever be the particular user-space process that's reading from /dev/random that blocks. Everything else should carry on fine in the meantime. In the unstable tree, AFAIK all interrupt sources are correctly adding entropy to the kernel's entropy pool -- there are just fewer bits of entropy generated per second in a VM. If people are still finding that some heavy users of /dev/random are blocking unexpectedly (e.g. apache during startup) then we'll need to think what to do. One grim hack would be to modify the guest kernel to make it less conservative about its estimate of entropy generated. An alternative would be to have Xen handle entropy generation centrally (from all physical interrupt sources) and then have a special random driver in each guest. Ian ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |