Re: [PATCH] kernel: Expose SYS_kcmp by default

[Lucas Stach]

Am Samstag, dem 13.02.2021 um 18:40 +0100 schrieb Pavel Machek:
> Hi!
> 
> > Userspace has discovered the functionality offered by SYS_kcmp and has
> > started to depend upon it. In particular, Mesa uses SYS_kcmp for
> > os_same_file_description() in order to identify when two fd (e.g. device
> > or dmabuf) point to the same struct file. Since they depend on it for
> > core functionality, lift SYS_kcmp out of the non-default
> > CONFIG_CHECKPOINT_RESTORE into the selectable syscall category.
> 
> Is it good idea to enable everything because Mesa uses it for file
> descriptors?
> 
> This is really interesting syscall...

As Debian/Ubuntu and Fedora are already shipping with
CONFIG_CHECKPOINT_RESTORE=y in their kernel configs, I don't really see
the need to add further restrictions here. Or this discussion should
have happened a while ago...

Regards,
Lucas