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[Qemu-devel] [PULL 15/18] main-loop: remove now unnecessary optimization


From: Paolo Bonzini
Subject: [Qemu-devel] [PULL 15/18] main-loop: remove now unnecessary optimization
Date: Tue, 14 Mar 2017 17:18:17 +0100

This optimization is not necessary anymore, because the vCPU now drops
the I/O thread lock even with TCG.  Drop it to simplify the code and
avoid the "I/O thread spun for 1000 iterations" warning.

Reviewed-by: Alex Bennée <address@hidden>
Reviewed-by: Edgar E. Iglesias <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
 vl.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/vl.c b/vl.c
index 1a95500..0b4ed52 100644
--- a/vl.c
+++ b/vl.c
@@ -1888,17 +1888,14 @@ static bool main_loop_should_exit(void)
 
 static void main_loop(void)
 {
-    bool nonblocking;
-    int last_io = 0;
 #ifdef CONFIG_PROFILER
     int64_t ti;
 #endif
     do {
-        nonblocking = tcg_enabled() && last_io > 0;
 #ifdef CONFIG_PROFILER
         ti = profile_getclock();
 #endif
-        last_io = main_loop_wait(nonblocking);
+        main_loop_wait(false);
 #ifdef CONFIG_PROFILER
         dev_time += profile_getclock() - ti;
 #endif
-- 
1.8.3.1





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