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Subject[KVM PATCH v8 0/3] irqfd fixes and enhancements
Date
(Applies to kvm.git/master:beeaacd1)

The following is the latest attempt to fix the races in irqfd/eventfd, as
well as restore DEASSIGN support. For more details, please read the patch
headers.

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

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

Kind Regards,
-Greg


[Changelog:

v8:
*) Rebased to kvm.git/master:beeaacd1)
*) Dropped Davide's patch (2/5 in v7) since it's now upstream
*) Folded v7's 1/5 and 3/5 together, and added a single
eventfd hunk to convert wake_up_locked_polled to wake_up_polled
*) Dropped irqfd->active bit in favor of irqfd_is_active() function
*) Cleaned up comments in 1/3
*) Dropped v7's 5/5 (slow-work)
*) Added new patch (3/3) which makes the cleanup-wq's creation
dynamic so to avoid the resource penalty for guests that do
not use irqfd.

v7:
*) Addressed minor-nit feedback from Michael
*) Cleaned up patch headers
*) Re-added separate slow-work feature patch to end for comparison

v6:
*) Removed slow-work in favor of using a dedicated single-thread
workqueue.
*) Condensed cleanup path to always use deferred shutdown
*) Saved about 56 lines over v5, with the following diffstat:

include/linux/kvm_host.h | 2
virt/kvm/eventfd.c | 248 ++++++++++++++++++-----------------------------
2 files changed, 97 insertions(+), 153 deletions(-)
v5:
Untracked..
]

---

Gregory Haskins (3):
KVM: create irqfd-cleanup-wq on demand
KVM: add irqfd DEASSIGN feature
KVM: Fix races in irqfd using new eventfd_kref_get interface


fs/eventfd.c | 7 -
include/linux/kvm.h | 2
include/linux/kvm_host.h | 6 +
virt/kvm/eventfd.c | 281 ++++++++++++++++++++++++++++++++++++----------
4 files changed, 229 insertions(+), 67 deletions(-)

--
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