Re: [PATCH v4 2/2] util/coroutine: Reduce default idle pool max size

["Daniel P. Berrangé" <berrange@redhat.com>]

On Wed, Oct 14, 2026 at 04:55:46PM -0500, Wesley Hershberger wrote:
> If g_file_get_contents fails (AppArmor, etc), use a more conservative
> default max size for the idle coroutine pool.
> 
> This avoids any possibility of the failure described in 86a637e48104
> unless the host kernel is configured with a lower-than-default
> vm.max_map_count.
> 
> This change is motivated by a discussion of backport risk:
> https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/2168803/comments/8
> 
> Fixes: 86a637e48104 ("coroutine: cap per-thread local pool size")
> Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
> Signed-off-by: Wesley Hershberger <wesley.hershberger@canonical.com>
> ---
>  util/qemu-coroutine.c | 73 ++++++++++++++++++++++++++++++++-------------------
>  1 file changed, 46 insertions(+), 27 deletions(-)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>


With regards,
Daniel
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