Bugzilla bug 113740: do not use the 32-bit SPARC assembly implementation of

PRStack because it may cause starvation of the lock owner, leaving the
other threads spinning trying to acquire the lock.
Modified files: configure configure.in pr/include/md/_solaris.h

3 files changed, 6 insertions, 6 deletions

diff --git a/configure b/configure
index 91f58f17..e5d01dbe 100755
--- a/configure
+++ b/configure
@@ -5282,8 +5282,6 @@ EOF
             PR_MD_ASFILES=os_SunOS.s
             if test -n "$USE_64"; then
                 PR_MD_ASFILES="$PR_MD_ASFILES os_SunOS_sparcv9.s"
-            else
-                PR_MD_ASFILES="$PR_MD_ASFILES os_SunOS_32.s"
             fi
         fi
     fi
@@ -5536,7 +5534,7 @@ s%\[%\\&%g
 s%\]%\\&%g
 s%\$%$$%g
 EOF
-DEFS=`sed -f conftest.defs confdefs.h | tr '\012' ' '| tr '\015' ' '`
+DEFS=`sed -f conftest.defs confdefs.h | tr '\012' ' ' | tr '\015' ' '`
 rm -f conftest.defs
 
 
diff --git a/configure.in b/configure.in
index bf2aa242..462e62e0 100644
--- a/configure.in
+++ b/configure.in
@@ -2146,8 +2146,6 @@ case "$target" in
             PR_MD_ASFILES=os_SunOS.s
             if test -n "$USE_64"; then
                 PR_MD_ASFILES="$PR_MD_ASFILES os_SunOS_sparcv9.s"
-            else
-                PR_MD_ASFILES="$PR_MD_ASFILES os_SunOS_32.s"
             fi
         fi
     fi
diff --git a/pr/include/md/_solaris.h b/pr/include/md/_solaris.h
index fdc2ef64..a6412b69 100644
--- a/pr/include/md/_solaris.h
+++ b/pr/include/md/_solaris.h
@@ -81,8 +81,12 @@
 /*
  * We have assembly language implementation of atomic
  * stacks for the 32-bit sparc and x86 architectures only.
+ *
+ * Note: We ran into thread starvation problem with the
+ * 32-bit sparc assembly language implementation of atomic
+ * stacks, so we do not use it now. (Bugzilla bug 113740)
  */
-#if !defined(sparc) || !defined(IS_64)
+#if !defined(sparc)
 #define _PR_HAVE_ATOMIC_CAS
 #endif
 #endif