[KVM PATCH v3 0/3] irqfd/eventfd fixes

Gregory Haskins
2009-06-22T16:06:10Z

(Applies to kvm.git/master:4631e094)

The following is the latest attempt to fix the remaining races in
irqfd/eventfd. For more details, please read the patch headers.

This series has been tested against the kvm-eventfd unit test, and
appears to be functioning properly. You can download this test here:

ftp://ftp.novell.com/dev/ghaskins/kvm-eventfd.tar.bz2

(Note: I believe either the eventfd solution in 2/3, or the patch that
Davide has proposed should work equally well. Its purely a question of
which direction we want to go in w.r.t. the wakeup registration).

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Gregory Haskins (3):
KVM: Fix races in irqfd using new eventfd_kref_get interface
eventfd: add internal reference counting to fix notifier race conditions
kvm: prepare irqfd for having interrupts disabled during eventfd->release

fs/eventfd.c | 43 ++++++++++--
include/linux/eventfd.h | 7 ++
virt/kvm/eventfd.c | 173 +++++++++++++++++++++++++++++------------------
3 files changed, 150 insertions(+), 73 deletions(-)

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