The Xen specific queue spinlock wait function has two issues which could result in a hanging system.
They have a similar root cause of clearing a pending wakeup of a waiting vcpu and later going to sleep waiting for the just cleared wakeup event, which of course won't ever happen. Juergen Gross (2): xen: fix race in xen_qlock_wait() xen: make xen_qlock_wait() nestable arch/x86/xen/spinlock.c | 33 ++++++++++++--------------------- 1 file changed, 12 insertions(+), 21 deletions(-) Cc: [email protected] Cc: [email protected] -- 2.16.4 _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
