Re: [Qemu-devel] [PATCH] AIO: Reduce number of threads for 32bit hosts

[Paolo Bonzini <pbonzini@redhat.com>]

On 14/01/2015 01:56, Alexander Graf wrote:
> +    if (sizeof(pool) == 4) {
> +        /* 32bit systems run out of virtual memory quickly */
> +        pool->max_threads = 4;
> +    } else {
> +        pool->max_threads = 64;
> +    }

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>

The same problem applies to coroutine stacks, and those cannot be
throttled down as easily.  But I guess if you limit the number of
threads, the guest gets slowed down and doesn't create as many coroutines.

It would be nice to have a way to measure coroutine stack usage, similar
to what the kernel does.

Paolo