From 6b366a25f9fd496777ff42932685924eb83696fc Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <tschwinge@gnu.org>
Date: Wed, 24 Apr 2013 11:46:58 +0200
Subject: IRC.

---
 microkernel/mach/rpc/discussion.mdwn | 37 ++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

(limited to 'microkernel/mach/rpc/discussion.mdwn')

diff --git a/microkernel/mach/rpc/discussion.mdwn b/microkernel/mach/rpc/discussion.mdwn
index 00e4a012..ee9f059a 100644
--- a/microkernel/mach/rpc/discussion.mdwn
+++ b/microkernel/mach/rpc/discussion.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2011 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2011, 2013 Free Software Foundation, Inc."]]
 
 [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
 id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -10,8 +10,12 @@ License|/fdl]]."]]"""]]
 
 [[!tag open_issue_documentation]]
 
+[[!toc]]
 
-# IRC, freenode, #hurd, 2011-06-11
+
+# Mach initiating RPCs to userspace tasks
+
+## IRC, freenode, #hurd, 2011-06-11
 
     <antrik> I don't think we have a precendence case of Mach initiating RPCs
       to userspace tasks
@@ -115,3 +119,32 @@ License|/fdl]]."]]"""]]
     <braunr> right, i really need to read about mig again
     <antrik> it's pretty normal for a translator to both implement and use an
       interface
+
+
+# `MACH_SEND_INTERRUPT`/`MACH_RCV_INTERRUPT`
+
+[[!tag open_issue_glibc open_issue_gnumach]]
+
+
+## IRC, freenode, #hurd, 2013-03-22
+
+    <braunr> i'm also testing glibc packages on darnassus with a patch that
+      removes the MACH_{SEND,RCV}_INTERRUPT options from mach_msg calls to
+      avoid taking the slow path because of them
+    <braunr> if i got it right, almost every mach_msg call doesn't use any of
+      these options, except for select
+    <braunr> it could slightly improve that, i'm not sure
+    <youpi> but don't we need that to get EINTR ?
+    <braunr> the options are purely userspace
+    <braunr> i'll upload the patch
+    <braunr>
+      http://www.sceen.net/~rbraun/0001-Mask-options-implemented-by-the-userspace-side-of-ma.patch
+    <youpi> ah, ok, you mean userspace already implements what we need
+
+
+## IRC, freenode, #hurd, 2013-04-23
+
+    <braunr> i couldn't measure any difference with the glibc patch that
+      removes the mach_msg interrupt related flags
+    <braunr> which isn't very surprising as it only concerns select as far as i
+      can tell
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