On Wed, 2018-11-28 at 11:50 -0700, Jens Axboe wrote: > On 11/28/18 2:33 AM, Benny Halevy wrote: > > > I don't see how we can get there with it being larger than already, > > > that would be a big bug if we fill more events than userspace asked > > > for. > > > > > > > Currently we indeed can't, but if the code changes in the future and > > we do, this will reduce the damage - hence being safer (and it costs > > nothing in terms of performance). > > The thing is, if we're ever over max, we have potentially corrupted user > space memory by copying back too many events. So if anything, it should > be a BUG() condition, not just a check. > Agreed.
