On Wed, Feb 17, 2021 at 01:02:41AM +0000, Nadav Amit wrote: > > On Feb 16, 2021, at 10:59 AM, Peter Zijlstra <pet...@infradead.org> wrote: > > > > On Tue, Feb 16, 2021 at 06:53:09PM +0000, Nadav Amit wrote: > >>> On Feb 16, 2021, at 8:32 AM, Peter Zijlstra <pet...@infradead.org> wrote: > > > >>> I'm not sure I can explain it yet. It did get me looking at > >>> on_each_cpu() and it appears that wants to be converted too, something > >>> like the below perhaps. > >> > >> Looks like a good cleanup, but I cannot say I understand the problem and > >> how > >> it would solve it. Err... > > > > Yeah, me neither. Bit of a mystery so far. > > This stall seems to be real. Intuitively I presumed preemption was > mistakenly enabled, but it does not seem so. > > Any chance you can build the kernel with “CONFIG_CSD_LOCK_WAIT_DEBUG=Y” and > rerun it? Perhaps that output will tell us more.
Sadly not my system. It's a KernelCI box.
