Messages in this thread |  | | | Date | Thu, 21 Jan 2010 19:32:59 +0200 | | From | "Michael S. Tsirkin" <> | | Subject | Re: [PATCHv2 1/3] eventfd: allow atomic read and waitqueue remove |
| |
On Thu, Jan 21, 2010 at 07:33:02PM +0200, Avi Kivity wrote: > On 01/21/2010 07:23 PM, Michael S. Tsirkin wrote: >> >>> I agree. >>> >>> But I think we can solve this in another way in .32: we can clear the >>> eventfd from irqfd->inject work, which is in process context. The new >>> stuff is only needed for lockless clearing, no? >>> >> No, AFAIK there's no way to clear the counter from kernel without >> this patch. >> > > Can't you read from the file?
IMO no, the read could block.
> -- > Do not meddle in the internals of kernels, for they are subtle and quick to panic.
|  |