From 3afce36dd4f6624c88c9720c4890b9f9cb9e0c90 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Tue, 18 Dec 2018 15:17:21 -0800
Subject: [PATCH] ircd::info: Get sysconf() for maximum AIO operations.

---
 include/ircd/info.h |  1 +
 ircd/info.cc        | 13 +++++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/include/ircd/info.h b/include/ircd/info.h
index 1515ff9fd..8e52faefe 100644
--- a/include/ircd/info.h
+++ b/include/ircd/info.h
@@ -52,6 +52,7 @@ namespace ircd::info
 
 	extern const int glibc_version[3];
 	extern const string_view glibc_version_str;
+	extern const int aio_max_ops;
 	extern const int aio_reqprio_max;
 	extern const size_t iov_max;
 	#ifdef HAVE_SYS_UTSNAME_H
diff --git a/ircd/info.cc b/ircd/info.cc
index 919d11467..2a0c06b5e 100644
--- a/ircd/info.cc
+++ b/ircd/info.cc
@@ -77,13 +77,14 @@ ircd::info::dump()
 	// This message flashes posix information about the resource limits
 	log::debug
 	{
-		"AS=%lu DATA=%lu RSS=%lu NOFILE=%lu; RTTIME=%lu aio_reqprio_max=%d",
+		"AS=%lu DATA=%lu RSS=%lu NOFILE=%lu; RTTIME=%lu aio_max_ops=%d aio_reqprio_max=%d",
 		rlimit_as,
 		rlimit_data,
 		rlimit_rss,
 		rlimit_nofile,
 		rlimit_rttime,
-		aio_reqprio_max
+		aio_max_ops,
+		aio_reqprio_max,
 	};
 }
 
@@ -199,6 +200,14 @@ ircd::info::glibc_version_str
                glibc_version[2])
 );
 
+decltype(ircd::info::aio_max_ops)
+ircd::info::aio_max_ops
+{
+	#ifdef _SC_AIO_MAX
+	int(syscall(::sysconf, _SC_AIO_MAX))
+	#endif
+};
+
 decltype(ircd::info::aio_reqprio_max)
 ircd::info::aio_reqprio_max
 {