WebDuring the event transfer loop (from kernel to. * user space) we could end up sleeping due a copy_to_user (), so. * we need a lock that will allow us to sleep. This lock is a. * mutex (ep->mtx). It is acquired during the event transfer loop, * during epoll_ctl (EPOLL_CTL_DEL) and during eventpoll_release_file (). WebOn Mon, Mar 05, 2024 at 01:27:20PM -0800, Christoph Hellwig wrote: >->get_poll_head returns the waitqueue that the poll operation is going > to sleep on. Note that this means we can only use a single waitqueue > for the poll, unlike some current drivers that use two waitqueues for > different events. But now that we have keyed wakeups and heavily use
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Web2 days ago · File Photo. April 12, 2024 1:00 AM. The Rathdrum Chamber of Commerce is accepting sponsorship applications for the Rathdrum Days parade at 10 a.m. July 22 on Main Street in Rathdrum. The ... WebNov 8, 2011 · epoll only makes sense for file descriptors which would normally exhibit blocking behavior on read/write, like pipes and sockets. Normal file descriptors will always either return a result or end-of-file more or less immediately, so epoll wouldn't do anything useful for them. phi phi island yoga retreat
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Web1 day ago · A fifth of respondents (19%) cited crime as their top concern, nearly twice what respondents reported in the last F&M poll in October. Crime, like the state of a person’s finances, comes down to ... WebFeb 11, 2010 · Later on, this DEFAULT_POLLMASK is masked with your mask, which returns POLLIN, even though no test have been really performed with the device, since a file device does not provide an f_op->poll() function. Epoll will fail you explicitly, while poll/select will not. but nothing meaningful is returned from poll/select on file system files. WebThe purpose of taking the. * EPOLL_CTL_ADD operations. * Try to lookup the file inside our RB tree. Since we grabbed "mtx". * ep_find () till we release the mutex. * file descriptors inside the interest set. * Implement the event wait interface for the eventpoll file. phi phi island with kids