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

Dietmar Maurer dietmar at proxmox.com
Thu May 28 17:35:58 CEST 2015


> This is not okay and this is what is actually happening:
> 0. set_buffer
> 1. start_writing_with_o_direct_from_buffer
> 2. change_buffer (we can do this only in another thread)
> 3. finish_writing_with_o_direct_from_buffer
> 4. change_buffer
> 5. start_writing_with_o_direct_from_buffer
> 6. change_buffer (we can do this only in another thread)
> 7. finish_writing_with_o_direct_from_buffer
> 8 ...

But there is currently only one io-thread in qemu, so this 
cannot happen with qemu if above is the only problem?



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