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    SubjectRe: [KVM PATCH v6 0/4] irqfd fixes and enhancements
    Gregory Haskins wrote:
    > (Applies to kvm.git/master:4631e094)
    >
    > 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.
    >
    > You can also find this applied as a git tree:
    >
    > git pull git://git.kernel.org/pub/scm/linux/kernel/git/ghaskins/linux-2.6-hacks.git kvm/irqfd
    >
    > For reviewing convenience, here is a link to the entire virt/kvm/eventfd.c
    > file after the patches are applied:
    >
    > http://git.kernel.org/?p=linux/kernel/git/ghaskins/linux-2.6-hacks.git;a=blob;f=virt/kvm/eventfd.c;h=409d9e160f1f85618a5e3772937b2721a249399a;hb=85cfd57e33dcaea29971513334ca003764653b21
    >
    > As always, 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
    >
    > I've included version 4 of Davide's eventfd patch (ported to kvm.git) so
    > that its a complete reviewable series. Note, however, that there may be
    > later versions of his patch to consider for merging, so we should
    > coordinate with him.
    >
    > -Greg
    >
    >
    > [Changelog:
    >
    > 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(-)
    >

    Forgot another change:

    *) Fixed race in ASSIGN for the proper
    acquisition order of the irqfd->eventfd

    > v5:
    > Untracked..
    > ]
    >
    > ---
    >
    > Davide Libenzi (1):
    > eventfd - revised interface and cleanups (4th rev)
    >
    > Gregory Haskins (3):
    > KVM: add irqfd DEASSIGN feature
    > KVM: Fix races in irqfd using new eventfd_kref_get interface
    > kvm: prepare irqfd for having interrupts disabled during eventfd->release
    >
    >
    > drivers/lguest/lg.h | 2
    > drivers/lguest/lguest_user.c | 4 -
    > fs/aio.c | 24 +---
    > fs/eventfd.c | 126 ++++++++++++++++++++---
    > include/linux/aio.h | 4 -
    > include/linux/eventfd.h | 35 +++++-
    > include/linux/kvm.h | 2
    > include/linux/kvm_host.h | 5 +
    > virt/kvm/Kconfig | 1
    > virt/kvm/eventfd.c | 229 +++++++++++++++++++++++++++++++-----------
    > 10 files changed, 321 insertions(+), 111 deletions(-)
    >
    >


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