Messages in this thread | | | From | Gregory Haskins <> | Subject | [KVM PATCH v8 0/3] irqfd fixes and enhancements | Date | Wed, 01 Jul 2009 12:08:57 -0400 |
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(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.. ]
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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(-)
-- Signature
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