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aio-posix: avoid unnecessary aio_epoll_enabled() calls
As epoll whether enabled or not is a global setting, we can just check it only once rather than checking it with every node iteration. Through this we can avoid a lot of checks when epoll is not enabled. Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com> Reviewed-by: Xiubo Li <lixiubo@cmss.chinamobile.com> Message-id: 1473851019-7005-3-git-send-email-baiyaowei@cmss.chinamobile.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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parent
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commit
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12
aio-posix.c
12
aio-posix.c
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@ -431,11 +431,13 @@ bool aio_poll(AioContext *ctx, bool blocking)
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assert(npfd == 0);
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assert(npfd == 0);
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/* fill pollfds */
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/* fill pollfds */
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QLIST_FOREACH(node, &ctx->aio_handlers, node) {
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if (!node->deleted && node->pfd.events
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if (!aio_epoll_enabled(ctx)) {
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&& !aio_epoll_enabled(ctx)
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QLIST_FOREACH(node, &ctx->aio_handlers, node) {
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&& aio_node_check(ctx, node->is_external)) {
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if (!node->deleted && node->pfd.events
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add_pollfd(node);
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&& aio_node_check(ctx, node->is_external)) {
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add_pollfd(node);
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}
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}
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}
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}
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}
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