> 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.
