| … | |
… | |
| 336 | break; |
336 | break; |
| 337 | } |
337 | } |
| 338 | #if EPOLL_FALLBACK |
338 | #if EPOLL_FALLBACK |
| 339 | else if (errno == EINVAL) |
339 | else if (errno == EINVAL) |
| 340 | { |
340 | { |
| 341 | /* This hapΓΌpens for unsupported fds, officially, but in my testing, |
341 | /* This happens for unsupported fds, officially, but in my testing, |
| 342 | * also randomly happens for supported fds. We fall back to good old |
342 | * also randomly happens for supported fds. We fall back to good old |
| 343 | * poll() here, under the assumption that this is a very rare case. |
343 | * poll() here, under the assumption that this is a very rare case. |
|
|
344 | * See https://lore.kernel.org/patchwork/patch/1047453/ for evidence |
|
|
345 | * that the problem is known, but ignored. |
| 344 | */ |
346 | */ |
| 345 | struct iocb *iocb = linuxaio_submits [submitted]; |
347 | struct iocb *iocb = linuxaio_submits [submitted]; |
| 346 | res = 1; /* skip this iocb */ |
348 | res = 1; /* skip this iocb */ |
| 347 | |
349 | |
| 348 | linuxaio_rearm_epoll (EV_A_ iocb, EPOLL_CTL_ADD); |
350 | linuxaio_rearm_epoll (EV_A_ iocb, EPOLL_CTL_ADD); |
| … | |
… | |
| 404 | int |
406 | int |
| 405 | linuxaio_init (EV_P_ int flags) |
407 | linuxaio_init (EV_P_ int flags) |
| 406 | { |
408 | { |
| 407 | /* would be great to have a nice test for IOCB_CMD_POLL instead */ |
409 | /* would be great to have a nice test for IOCB_CMD_POLL instead */ |
| 408 | /* also: test some semi-common fd types, such as files and ttys in recommended_backends */ |
410 | /* also: test some semi-common fd types, such as files and ttys in recommended_backends */ |
| 409 | if (ev_linux_version () < 0x041200) /* 4.18 introduced IOCB_CMD_POLL */ |
411 | #if EPOLL_FALLBACK |
|
|
412 | /* 4.19 made epoll work */ |
|
|
413 | if (ev_linux_version () < 0x041300) |
| 410 | return 0; |
414 | return 0; |
|
|
415 | #else |
|
|
416 | /* 4.18 introduced IOCB_CMD_POLL */ |
|
|
417 | if (ev_linux_version () < 0x041200) |
|
|
418 | return 0; |
|
|
419 | #endif |
| 411 | |
420 | |
| 412 | linuxaio_ctx = 0; |
421 | linuxaio_ctx = 0; |
| 413 | if (ev_io_setup (EV_LINUXAIO_DEPTH, &linuxaio_ctx) < 0) |
422 | if (ev_io_setup (EV_LINUXAIO_DEPTH, &linuxaio_ctx) < 0) |
| 414 | return 0; |
423 | return 0; |
| 415 | |
424 | |
| … | |
… | |
| 421 | return 0; |
430 | return 0; |
| 422 | } |
431 | } |
| 423 | |
432 | |
| 424 | ev_io_init (EV_A_ &linuxaio_epoll_w, linuxaio_epoll_cb, backend_fd, EV_READ); |
433 | ev_io_init (EV_A_ &linuxaio_epoll_w, linuxaio_epoll_cb, backend_fd, EV_READ); |
| 425 | ev_io_start (EV_A_ &linuxaio_epoll_w); |
434 | ev_io_start (EV_A_ &linuxaio_epoll_w); |
|
|
435 | ev_unref (EV_A); /* watcher should not keep loop alive */ |
| 426 | #endif |
436 | #endif |
| 427 | |
437 | |
| 428 | backend_modify = linuxaio_modify; |
438 | backend_modify = linuxaio_modify; |
| 429 | backend_poll = linuxaio_poll; |
439 | backend_poll = linuxaio_poll; |
| 430 | |
440 | |
| … | |
… | |
| 466 | ev_syserr ("(libev) linuxaio epoll_create"); |
476 | ev_syserr ("(libev) linuxaio epoll_create"); |
| 467 | |
477 | |
| 468 | ev_io_stop (EV_A_ &linuxaio_epoll_w); |
478 | ev_io_stop (EV_A_ &linuxaio_epoll_w); |
| 469 | ev_io_init (EV_A_ &linuxaio_epoll_w, linuxaio_epoll_cb, backend_fd, EV_READ); |
479 | ev_io_init (EV_A_ &linuxaio_epoll_w, linuxaio_epoll_cb, backend_fd, EV_READ); |
| 470 | ev_io_start (EV_A_ &linuxaio_epoll_w); |
480 | ev_io_start (EV_A_ &linuxaio_epoll_w); |
| 471 | ev_unref (EV_A); /* watcher should not keep loop alive */ |
|
|
| 472 | #endif |
481 | #endif |
| 473 | |
482 | |
| 474 | fd_rearm_all (EV_A); |
483 | fd_rearm_all (EV_A); |
| 475 | } |
484 | } |
| 476 | |
485 | |
