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Fixing Linux AIO initiatialization: AIO operations are disabled if kernel

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does not support them.  Previously worker just exited.
This commit is contained in:
Igor Sysoev 2011-09-16 13:41:52 +00:00
parent 4134b48b68
commit aa997c0289
1 changed files with 82 additions and 47 deletions
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123
src/event/modules/ngx_epoll_module.c
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@ -205,6 +205,74 @@ io_getevents(aio_context_t ctx, long min_nr, long nr, struct io_event *events,
return syscall(SYS_io_getevents, ctx, min_nr, nr, events, tmo);
}
static void
ngx_epoll_aio_init(ngx_cycle_t *cycle)
{
int n;
struct epoll_event ee;
ngx_eventfd = syscall(SYS_eventfd, 0);
if (ngx_eventfd == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"eventfd() failed");
ngx_file_aio = 0;
return;
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"eventfd: %d", ngx_eventfd);
n = 1;
if (ioctl(ngx_eventfd, FIONBIO, &n) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"ioctl(eventfd, FIONBIO) failed");
goto failed;
}
if (io_setup(1024, &ngx_aio_ctx) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"io_setup() failed");
goto failed;
}
ngx_eventfd_event.data = &ngx_eventfd_conn;
ngx_eventfd_event.handler = ngx_epoll_eventfd_handler;
ngx_eventfd_event.log = cycle->log;
ngx_eventfd_event.active = 1;
ngx_eventfd_conn.fd = ngx_eventfd;
ngx_eventfd_conn.read = &ngx_eventfd_event;
ngx_eventfd_conn.log = cycle->log;
ee.events = EPOLLIN|EPOLLET;
ee.data.ptr = &ngx_eventfd_conn;
if (epoll_ctl(ep, EPOLL_CTL_ADD, ngx_eventfd, &ee) != -1) {
return;
}
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"epoll_ctl(EPOLL_CTL_ADD, eventfd) failed");
if (io_destroy(ngx_aio_ctx) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"io_destroy() failed");
}
failed:
if (close(ngx_eventfd) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"eventfd close() failed");
}
ngx_eventfd = -1;
ngx_aio_ctx = 0;
ngx_file_aio = 0;
}
#endif
@ -225,52 +293,9 @@ ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
}
#if (NGX_HAVE_FILE_AIO)
{
int n;
struct epoll_event ee;
ngx_eventfd = syscall(SYS_eventfd, 0);
ngx_epoll_aio_init(cycle);
if (ngx_eventfd == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"eventfd() failed");
return NGX_ERROR;
}
n = 1;
if (ioctl(ngx_eventfd, FIONBIO, &n) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"ioctl(eventfd, FIONBIO) failed");
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"eventfd: %d", ngx_eventfd);
if (io_setup(1024, &ngx_aio_ctx) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"io_setup() failed");
return NGX_ERROR;
}
ngx_eventfd_event.data = &ngx_eventfd_conn;
ngx_eventfd_event.handler = ngx_epoll_eventfd_handler;
ngx_eventfd_event.log = cycle->log;
ngx_eventfd_event.active = 1;
ngx_eventfd_conn.fd = ngx_eventfd;
ngx_eventfd_conn.read = &ngx_eventfd_event;
ngx_eventfd_conn.log = cycle->log;
ee.events = EPOLLIN|EPOLLET;
ee.data.ptr = &ngx_eventfd_conn;
if (epoll_ctl(ep, EPOLL_CTL_ADD, ngx_eventfd, &ee) == -1) {
ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
"epoll_ctl(EPOLL_CTL_ADD, eventfd) failed");
return NGX_ERROR;
}
}
#endif
}
@ -316,11 +341,21 @@ ngx_epoll_done(ngx_cycle_t *cycle)
#if (NGX_HAVE_FILE_AIO)
if (ngx_eventfd != -1) {
if (io_destroy(ngx_aio_ctx) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"io_destroy() failed");
}
if (close(ngx_eventfd) == -1) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"eventfd close() failed");
}
ngx_eventfd = -1;
}
ngx_aio_ctx = 0;
#endif