search for: selfpipe

Hi, tinc has a fixed timeout of 1 second for select() in the main loop. I think this could be improved. Do you think the following patch goes into the right direction ? I don't know whether pselect() is standard enough (works under "current" linux, however I don't know about the other arches). Maybe a config option is necessary. It's probably possible

...events & POLLIN && dir & LIBNBD_AIO_DIRECTION_READ) > nbd_aio_notify_read (); > else if (pollfd[0].revents & LIBNBD_AIO_DIRECTION_WRITE) and again > nbd_aio_notify_write (); > } or in the nbdkit case: nbdkit thread nbd_aio_pwrite (); write (selfpipe[1], &c, 1); reader thread for (;;) { dir = nbd_aio_get_direction (nbd); pollfd[0].fd = fd; pollfd[0].events = 0; pollfd[1].fd = selfpipe[0]; pollfd[1].events = POLLIN; if (dir & LIBNBD_AIO_DIRECTION_READ) pollfd[0].events |= POLLIN; if (dir & LIBNBD_AIO_DI...

This is a continuation of a discussion we were having on IRC. The problems with IRC are it's not recorded and it's hard to have deep technical conversations. I hope this is a decent summary. Problem simply stated: Certain NBD servers (qemu-nbd in particular) are able to simultaneously read and write on a socket. ie. They can be simultaneously reading a request and writing the reply to

...http_server.rb b/lib/unicorn/http_server.rb index f15c8a7..ae8ad13 100644 --- a/lib/unicorn/http_server.rb +++ b/lib/unicorn/http_server.rb @@ -42,16 +42,8 @@ class Unicorn::HttpServer # it to wake up the master from IO.select in exactly the same manner # djb describes in http://cr.yp.to/docs/selfpipe.html # - # * The workers immediately close the pipe they inherit from the - # master and replace it with a new pipe after forking. This new - # pipe is also used to wakeup from IO.select from inside (worker) - # signal handlers. However, workers *close* the pipe descriptors in - # the sig...