[pve-devel] Default cache mode for VM hard drives

Stanislav German-Evtushenko ginermail at gmail.com
Thu May 28 13:44:28 CEST 2015


> I'm not kernel/IO expert in any way, but I think this test program has a race condition, so it is not helping us diagnose the problem.
> We're writing to buffer x while it is in use by write syscall. This is plainly wrong on userspace.

Yes, and this is exactly what is happening inside QEMU-KVM process and
this is what I wanted to demonstrate.

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