On Mon 02-02-15 18:25:28, pasi.sjoh...@jolla.com wrote: > From: Pasi Sjöholm <pasi.sjoh...@jollamobile.com> > > It is possible to get kernel in deadlock-state if swap_lock is not locked > with spin_lock_bh by calling si_swapinfo() simultaneously through > timer_function and registered vm shinker callback-function. > > BUG: spinlock recursion on CPU#0, main/2447 > lock: swap_lock+0x0/0x10, .magic: dead4ead, .owner: main/2447, .owner_cpu: 0 > [<c010b938>] (unwind_backtrace+0x0/0x11c) from [<c03e9be0>] > (do_raw_spin_lock+0x48/0x154) > [<c03e9be0>] (do_raw_spin_lock+0x48/0x154) from [<c0226e10>] > (si_swapinfo+0x10/0x90) > [<c0226e10>] (si_swapinfo+0x10/0x90) from [<c04d7e18>] > (timer_function+0x24/0x258)
Who is calling si_swapinfo from timer_function? AFAICS the vanilla kernel doesn't do that. Or am I missing something? -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
