[PATCH v2 0/2] x86: add xen hypercall preemption

Luis R. Rodriguez
2014-12-10T23:34:59Z

From: "Luis R. Rodriguez" <mcgrof@suse.com>

This is my second series which addresses hypercall preemption
on Xen. On the first iteration of this series [0] I tried as
much as possible to avoid cond_resched() type of behaviour
but after good feedback I've determined using something like
cond_resched() but on IRQ context is required for preempting
Xen hypercalls. This introduces and uses the new cond_resched_irq().

[0] https://lkml.org/lkml/2014/11/26/630

Luis R. Rodriguez (2):
sched: add cond_resched_irq()
x86/xen: allow privcmd hypercalls to be preempted

arch/x86/kernel/entry_32.S | 21 +++++++++++++++++++++
arch/x86/kernel/entry_64.S | 17 +++++++++++++++++
drivers/xen/Makefile | 2 +-
drivers/xen/preempt.c | 17 +++++++++++++++++
drivers/xen/privcmd.c | 2 ++
include/linux/sched.h | 7 +++++++
include/xen/xen-ops.h | 26 ++++++++++++++++++++++++++
kernel/sched/core.c | 10 ++++++++++
8 files changed, 101 insertions(+), 1 deletion(-)
create mode 100644 drivers/xen/preempt.c

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2.1.1