On 07/01/2009 07:09 PM, Gregory Haskins wrote:
eventfd currently emits a POLLHUP wakeup on f_ops->release() to generate a "release" callback. This lets eventfd clients know if the eventfd is about to go away and is very useful particularly for in-kernel clients. However, until recently it is not possible to use this feature of eventfd in a race-free way. This patch utilizes a new eventfd interface to rectify the problem. It also converts the eventfd POLLHUP generation code to use the locked variant of wakeup. Signed-off-by: Gregory Haskins<ghaskins@xxxxxxxxxx> CC: Davide Libenzi<davidel@xxxxxxxxxxxxxxx> --- fs/eventfd.c | 7 -- include/linux/kvm_host.h | 5 + virt/kvm/eventfd.c | 187 ++++++++++++++++++++++++++++++++-------------- 3 files changed, 134 insertions(+), 65 deletions(-)
Please split the eventfd.c hunk into a separate patch. When preparing the 2.6.32 submission, I'll fold that into the patch into its antipatch and they'll disappear.
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