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sheepdog: use non-blocking fd in coroutine context 

Using a blocking socket in the coroutine context reduces the chance of
switching to other work.  This patch makes the sheepdog driver use a
non-blocking fd always.

Signed-off-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
MORITA Kazutaka 2013-03-12 16:05:42 +09:00 committed by Stefan Hajnoczi
parent 381b487d54
commit 0d6db300cd
1 changed files with 2 additions and 4 deletions
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6
block/sheepdog.c
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@ -468,6 +468,8 @@ static int connect_to_sdog(BDRVSheepdogState *s)
if (err != NULL) {
qerror_report_err(err);
error_free(err);
} else {
socket_set_nonblock(fd);
}
return fd;
@ -523,7 +525,6 @@ static coroutine_fn void do_co_req(void *opaque)
co = qemu_coroutine_self();
qemu_aio_set_fd_handler(sockfd, NULL, restart_co_req, NULL, co);
socket_set_block(sockfd);
ret = send_co_req(sockfd, hdr, data, wlen);
if (ret < 0) {
goto out;
@ -553,7 +554,6 @@ static coroutine_fn void do_co_req(void *opaque)
ret = 0;
out:
qemu_aio_set_fd_handler(sockfd, NULL, NULL, NULL, NULL);
socket_set_nonblock(sockfd);
srco->ret = ret;
srco->finished = true;
@ -776,8 +776,6 @@ static int get_sheep_fd(BDRVSheepdogState *s)
return fd;
}
socket_set_nonblock(fd);
qemu_aio_set_fd_handler(fd, co_read_response, NULL, aio_flush_request, s);
return fd;
}