On Wed, Apr 29, 2026 at 11:05:02AM -0700, Paul E. McKenney wrote: > On Wed, Apr 29, 2026 at 07:50:31PM +0200, Vasily Gorbik wrote: > > On Tue, Apr 14, 2026 at 12:24:12PM -0700, Paul E. McKenney wrote: > > > On Thu, Apr 09, 2026 at 09:03:26PM -0700, Paul E. McKenney wrote: > > > Please see below for the full patch, including refraining from queueing > > > workqueue handlers on not-yet-online CPUs and diverting SRCU callbacks > > > from not-yet-fully-online CPUs to the boot CPU's callback queue. > > ... > > > commit ce533a60b2ef29a9b516cc717e77c6b679bc09c0 > > > Author: Paul E. McKenney <[email protected]> > > > Date: Thu Apr 9 11:16:02 2026 -0700 > > > > > > srcu: Don't queue workqueue handlers to never-online CPUs > > > ... > > > > > > Reported-by: Vasily Gorbik <[email protected]> > > > Signed-off-by: Paul E. McKenney <[email protected]> > > > Tested-by: Vasily Gorbik <[email protected]> > > > Cc: Tejun Heo <[email protected]> > > > > I retested it on s390 and on x86 KVM with --smp 16,maxcpus=255, all > > looks good to me. > > > > FWIW, again: > > > > Tested-by: Vasily Gorbik <[email protected]> > > > > Would you mind adding Cc: stable so it gets picked up for v7.0? > > 61bbcfb50514 ("srcu: Push srcu_node allocation to GP when > > non-preemptible") is what made it reproducible for us. > > > > Thank you! > > And thank you for testing it, plus apologies for the hassle! > > At my next rebase, I will add the following: > > Fixes: 61bbcfb50514 ("srcu: Push srcu_node allocation to GP when > non-preemptible") > Tested-by: Vasily Gorbik <[email protected]> > > That should pull it into the needed -stable releases. > > Seem reasonable?
Perfect, thanks Paul!
