Re: [PATCH v2] qemu_init: increase NOFILE soft limit on POSIX

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

On Fri, Feb 02, 2024 at 09:35:19AM +0100, Fiona Ebner wrote:
> Am 18.12.23 um 11:13 schrieb Fiona Ebner:
> > In many configurations, e.g. multiple vNICs with multiple queues or
> > with many Ceph OSDs, the default soft limit of 1024 is not enough.
> > QEMU is supposed to work fine with file descriptors >= 1024 and does
> > not use select() on POSIX. Bump the soft limit to the allowed hard
> > limit to avoid issues with the aforementioned configurations.
> > 
> > Of course the limit could be raised from the outside, but the man page
> > of systemd.exec states about 'LimitNOFILE=':
> > 
> >> Don't use.
> >> [...]
> >> Typically applications should increase their soft limit to the hard
> >> limit on their own, if they are OK with working with file
> >> descriptors above 1023,
> > 
> > If the soft limit is already the same as the hard limit, avoid the
> > superfluous setrlimit call. This can avoid a warning with a strict
> > seccomp filter blocking setrlimit if NOFILE was already raised before
> > executing QEMU.
> > 
> > Buglink: https://bugzilla.proxmox.com/show_bug.cgi?id=4507
> > Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
> > ---
> > 
> 
> Ping

I have this queued already for my next pull request

With regards,
Daniel
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