On Thursday, May 7, 2015, Pavel Fedin <p.fe...@samsung.com> wrote: > Hello! > > > The issue is similar to what you have noticed. > > In this case it's probably not your fault. > > > The larger the number of smp cores it is more likely that the boot will > get stuck. > > I've commuted this patch series as an RFC because of this issue. > > I have tried to give more testing to it. Up to 4 CPUs worked okay (if we > ignore "press any key" problem which i described). Starting from 5 i get a > hard freeze right after " SMP: Total of N processors activated" message. > However, i get this deadlock also with GICv2, so it's perhaps not your > fault. The second problem is that i did not manage to bring up more than 8 > CPUs. The following happens: > --- cut --- > Initializing cgroup subsys memory > Initializing cgroup subsys hugetlb > hw perfevents: no hardware support available > EFI services will not be available. > CPU1: Booted secondary processor > Detected PIPT I-cache on CPU1 > CPU1: found redistributor 1 region 0:0x0000000008060000 > CPU2: Booted secondary processor > Detected PIPT I-cache on CPU2 > CPU2: found redistributor 2 region 0:0x0000000008080000 > CPU3: Booted secondary processor > Detected PIPT I-cache on CPU3 > CPU3: found redistributor 3 region 0:0x00000000080a0000 > CPU4: Booted secondary processor > Detected PIPT I-cache on CPU4 > CPU4: found redistributor 4 region 0:0x00000000080c0000 > CPU5: Booted secondary processor > Detected PIPT I-cache on CPU5 > CPU5: found redistributor 5 region 0:0x00000000080e0000 > CPU6: Booted secondary processor > Detected PIPT I-cache on CPU6 > CPU6: found redistributor 6 region 0:0x0000000008100000 > CPU7: Booted secondary processor > Detected PIPT I-cache on CPU7 > CPU7: found redistributor 7 region 0:0x0000000008120000 > psci: failed to boot CPU8 (-22) > CPU8: failed to boot: -22 > psci: failed to boot CPU9 (-22) > CPU9: failed to boot: -22 > psci: failed to boot CPU10 (-22) > CPU10: failed to boot: -22 > psci: failed to boot CPU11 (-22) > CPU11: failed to boot: -22 > psci: failed to boot CPU12 (-22) > CPU12: failed to boot: -22 > psci: failed to boot CPU13 (-22) > CPU13: failed to boot: -22 > psci: failed to boot CPU14 (-22) > CPU14: failed to boot: -22 > psci: failed to boot CPU15 (-22) > CPU15: failed to boot: -22 > Brought up 8 CPUs > SMP: Total of 8 processors activated. > --- cut --- > But, perhaps it's the fault of my code (i replaced your patch No 4 with > my own implementation, merging the code). I will post this alternative > version soon if you don't mind (need to rebase it on master). > > My current guest kernel is v3.19.5. I will test on 4.1rc2 soon. > > Kind regards, > Pavel Fedin > Expert Engineer > Samsung Electronics Research center Russia > > > Hi Pavel,
Check your code and see if in fdt_add_cpu_nodes and see if CPUs are added with correct MPIDR (Affinity). Best regards, S.P.
