> On 26 Feb 2016, at 4:17 PM, Philip Guenther <guent...@gmail.com> wrote: > > On Thu, Feb 25, 2016 at 3:42 AM, David Gwynne <da...@gwynne.id.au> wrote: >> the gc is run from a task in the systq, so we dont need a flag to >> serialise it. it is already serialised. >> >> ok? > > I have a TODO entry saying "instead of triggering the unp_gc task, set > a per-thread flag and then do the unp_gc call before returning to > userspace; still need unp_gc task for process/thread exit case?" > > The idea is that if my process closing an fd is responsible for > creating unp garbage, it should do the collection and get charged for > the kernel time instead of pushing that work to the system.
why does the gc have to occur later (ie, in a task as it is now or near userret) instead of directly? dlg
