alvise rigo <a.r...@virtualopensystems.com> writes: > This problem could be related to a missing multi-threaded aware > translation of the atomic instructions. > I'm working on this missing piece, probably the next week I will > publish something.
Maybe. We still have Fred's: Use atomic cmpxchg to atomically check the exclusive value in a STREX Which I think papers over the cracks for both arm and aarch64 in MTTCG while not being as correct as your work. > > Regards, > alvise > > On Fri, Jan 15, 2016 at 3:24 PM, Pranith Kumar <bobby.pr...@gmail.com> wrote: >> Hi Alex, >> >> On Fri, Jan 15, 2016 at 8:53 AM, Alex Bennée <alex.ben...@linaro.org> wrote: >>> Can you try this branch: >>> >>> >>> https://github.com/stsquad/qemu/tree/mttcg/multi_tcg_v8_wip_ajb_fix_locks-r1 >>> >>> I think I've caught all the things likely to screw up addressing. >>> >> >> I tried this branch and the boot hangs like follows: >> >> [ 2.001083] random: systemd-udevd urandom read with 1 bits of entropy >> available >> main-loop: WARNING: I/O thread spun for 1000 iterations >> [ 23.778970] INFO: rcu_sched detected stalls on CPUs/tasks: {} (detected >> by 0, t=2102 jiffies, g=-165, c=-166, q=83) This is just saying the kernel has been waiting for a while and nothing has happened. >> I will try to debug and see where it is hanging. If we knew what the kernel was waiting for that would be useful to know. >> >> Thanks! >> -- >> Pranith -- Alex Bennée