Re: [patch 0/2] virtio-blk async IO

[Gerd von Egidy <lists@egidy.de>]

Hi Marcelo,

> Use the asynchronous version of block IO functions, otherwise guests can
> block for long periods of time waiting for the operations to complete.

just tried these patches. Results are similar to the last ones: the guest 
comes up fine but after running 2 or 3 minutes of bonnie++ the guest-vm 
hangs. This time I used screen on the guest console to try switching to 
another process - hanging too.

Here is the kvm_stat --once output:

efer_reload                    0         0
exits                    3325114       196
fpu_reload                185671         0
halt_exits                 18692        29
halt_wakeup                24807         0
host_state_reload        1387308        59
insn_emulation           1924291       130
insn_emulation_fail            0         0
invlpg                         0         0
io_exits                  350020        30
irq_exits                 225446         3
irq_window                     0         0
mmio_exits                917561         0
mmu_cache_miss             55436         0
mmu_flooded                64416         0
mmu_pde_zapped             46914         0
mmu_pte_updated           565547         0
mmu_pte_write             650181         0
mmu_recycled                   0         0
mmu_shadow_zapped          64416         0
pf_fixed                 1229672         0
pf_guest                   94338         0
remote_tlb_flush               0         0
request_irq                    0         0
signal_exits                   1         0
tlb_flush                 602678         4

Kind regards,

Gerd

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