On 04/03/25(Tue) 16:58, Vitaliy Makkoveev wrote:
> On Tue, Mar 04, 2025 at 02:45:42PM +0100, Martin Pieuchot wrote:
> 
> > As long as we need vslock(9), which is something that I don't know, might
> > want to distinguish between userland vs kernel wiring like FreeBSD do.
> > 
> 
> We need vslock() userland pages to avoid context switch provides by
> copyin()/copyout(). In some cases, like kernel locked lists walkthrougs
> or netlocked sections this context switch is totally unwanted.

So this is about sysctl that do multiple copyout(9)?  To try to limit
side effects?

> I'm slightly moving sysctl(2) paths out of vslock(), so if you are
> interesting I could share stalled vfs_sysctl() diff with you.

Thanks, I'm busy for the moment.  I'll try to look at it when you'll
post it to tech@.