diff options
author | Paolo Bonzini <pbonzini@redhat.com> | 2010-02-11 00:23:46 +0100 |
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committer | Avi Kivity <avi@redhat.com> | 2010-02-17 14:59:00 +0200 |
commit | f3dfda6114fd12ca7caac456b1997962b5c48274 (patch) | |
tree | 0768d67a8b17a09fa27ad4cfa5fdfc438981393a /vl.c | |
parent | bf76bafa5ade434ef2747ceeeeaa95510ecb7946 (diff) | |
download | hqemu-f3dfda6114fd12ca7caac456b1997962b5c48274.zip hqemu-f3dfda6114fd12ca7caac456b1997962b5c48274.tar.gz |
use eventfd for iothread
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'vl.c')
-rw-r--r-- | vl.c | 9 |
1 files changed, 5 insertions, 4 deletions
@@ -3211,14 +3211,15 @@ static int io_thread_fd = -1; static void qemu_event_increment(void) { - static const char byte = 0; + /* Write 8 bytes to be compatible with eventfd. */ + static uint64_t val = 1; ssize_t ret; if (io_thread_fd == -1) return; do { - ret = write(io_thread_fd, &byte, sizeof(byte)); + ret = write(io_thread_fd, &val, sizeof(val)); } while (ret < 0 && errno == EINTR); /* EAGAIN is fine, a read must be pending. */ @@ -3235,7 +3236,7 @@ static void qemu_event_read(void *opaque) ssize_t len; char buffer[512]; - /* Drain the notify pipe */ + /* Drain the notify pipe. For eventfd, only 8 bytes will be read. */ do { len = read(fd, buffer, sizeof(buffer)); } while ((len == -1 && errno == EINTR) || len == sizeof(buffer)); @@ -3246,7 +3247,7 @@ static int qemu_event_init(void) int err; int fds[2]; - err = qemu_pipe(fds); + err = qemu_eventfd(fds); if (err == -1) return -errno; |