search for: spin_dump

...03dd27f ffff88056b227a88 ffffffffa1702276 [ 161.613469] 0000000000000000 ffff88017cf70000 ffff88056b227aa8 ffffffff9e1d009c [ 161.613469] ffffffffa3edae60 0000000086c3f830 ffff88056b227ad8 ffffffff9e1d01d7 [ 161.613469] Call Trace: [ 161.613469] dump_stack (lib/dump_stack.c:52) [ 161.613469] spin_dump (kernel/locking/spinlock_debug.c:68 (discriminator 8)) [ 161.613469] do_raw_spin_lock (include/linux/nmi.h:48 kernel/locking/spinlock_debug.c:119 kernel/locking/spinlock_debug.c:137) [ 161.613469] _raw_spin_lock (kernel/locking/spinlock.c:152) [ 161.613469] ? __purge_vmap_area_lazy (mm/vmalloc.c...

...03dd27f ffff88056b227a88 ffffffffa1702276 [ 161.613469] 0000000000000000 ffff88017cf70000 ffff88056b227aa8 ffffffff9e1d009c [ 161.613469] ffffffffa3edae60 0000000086c3f830 ffff88056b227ad8 ffffffff9e1d01d7 [ 161.613469] Call Trace: [ 161.613469] dump_stack (lib/dump_stack.c:52) [ 161.613469] spin_dump (kernel/locking/spinlock_debug.c:68 (discriminator 8)) [ 161.613469] do_raw_spin_lock (include/linux/nmi.h:48 kernel/locking/spinlock_debug.c:119 kernel/locking/spinlock_debug.c:137) [ 161.613469] _raw_spin_lock (kernel/locking/spinlock.c:152) [ 161.613469] ? __purge_vmap_area_lazy (mm/vmalloc.c...

Paravirt spinlock clears slowpath flag after doing unlock. As explained by Linus currently it does: prev = *lock; add_smp(&lock->tickets.head, TICKET_LOCK_INC); /* add_smp() is a full mb() */ if (unlikely(lock->tickets.tail & TICKET_SLOWPATH_FLAG)) __ticket_unlock_slowpath(lock, prev); which

Paravirt spinlock clears slowpath flag after doing unlock. As explained by Linus currently it does: prev = *lock; add_smp(&lock->tickets.head, TICKET_LOCK_INC); /* add_smp() is a full mb() */ if (unlikely(lock->tickets.tail & TICKET_SLOWPATH_FLAG)) __ticket_unlock_slowpath(lock, prev); which