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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=4d84e6addd62bdc256627af334ba85489112e008

commit 4d84e6addd62bdc256627af334ba85489112e008
Author: OndÅ?ej Bílka <neleai@seznam.cz>
Date:   Wed Dec 18 11:16:47 2013 +0100

    Update documentation after dropping PER_THREAD  conditional.
    
    In probes documentation we described what happens when PER_THREAD is
    disabled which is now not relevant.

diff --git a/ChangeLog b/ChangeLog
index da4b5a3..84bf75e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-12-18  OndÅ?ej Bílka  <neleai@seznam.cz>
+
+	* manual/probes.texi: Remove cases when per-thread arenas are
+	disabled.
+
 2013-12-18  Andreas Schwab  <schwab@suse.de>
 
 	* sysdeps/i386/i686/multiarch/strstr.c: Remove.
diff --git a/manual/probes.texi b/manual/probes.texi
index 7ba7bd3..437d10d 100644
--- a/manual/probes.texi
+++ b/manual/probes.texi
@@ -23,9 +23,7 @@ arguments.
 @section Memory Allocation Probes
 
 These probes are designed to signal relatively unusual situations within
-the virtual memory subsystem of @theglibc{}.  The location and the
-availability of some probes depend on whether per-thread arenas are
-enabled (the default) or disabled at the time @theglibc{} is compiled.
+the virtual memory subsystem of @theglibc{}.
 
 @deftp Probe memory_sbrk_more (void *@var{$arg1}, size_t @var{$arg2})
 This probe is triggered after the main arena is extended by calling
@@ -116,7 +114,7 @@ arena to reuse, and (temporarily) reserved it for exclusive use.
 Argument @var{$arg1} is a pointer to the newly-selected arena, and
 @var{$arg2} is a pointer to the arena previously used by that thread.
 
-When per-thread arenas are enabled, this occurs within
+This occurs within
 @code{reused_arena}, right after the mutex mentioned in probe
 @code{memory_arena_reuse_wait} is acquired; argument @var{$arg1} will
 point to the same arena.  In this configuration, this will usually only
@@ -125,11 +123,6 @@ the main arena, but a subsequent allocation from it fails: then, and
 only then, may we switch to another arena to retry that allocations, and
 for further allocations within that thread.
 
-When per-thread arenas are disabled, this occurs within
-@code{arena_get2}, whenever the mutex for the previously-selected arena
-cannot be immediately acquired.
-@end deftp
-
 @deftp Probe memory_arena_reuse_wait (void *@var{$arg1}, void *@var{$arg2}, void *@var{$arg3})
 This probe is triggered when @code{malloc} is about to wait for an arena
 to become available for reuse.  Argument @var{$arg1} holds a pointer to
@@ -137,7 +130,7 @@ the mutex the thread is going to wait on, @var{$arg2} is a pointer to a
 newly-chosen arena to be reused, and @var{$arg3} is a pointer to the
 arena previously used by that thread.
 
-When per-thread arenas are enabled, this occurs within
+This occurs within
 @code{reused_arena}, when a thread first tries to allocate memory or
 needs a retry after a failure to allocate from the main arena, there
 isn't any free arena, the maximum number of arenas has been reached, and
@@ -145,29 +138,10 @@ an existing arena was chosen for reuse, but its mutex could not be
 immediately acquired.  The mutex in @var{$arg1} is the mutex of the
 selected arena.
 
-When per-thread arenas are disabled, this occurs within
-@code{arena_get2}, when a thread first tries to allocate memory or the
-mutex of the arena it previously used could not be immediately acquired,
-and none of the existing arenas could be immediately reserved for
-exclusive use.  The mutex in @var{$arg1} is that of the list of arenas,
-and since the arena won't have been selected yet, @var{$arg2} will be
-@code{NULL}.
-@end deftp
-
 @deftp Probe memory_arena_reuse_free_list (void *@var{$arg1})
 This probe is triggered when @code{malloc} has chosen an arena that is
 in the free list for use by a thread, within the @code{get_free_list}
-function.  This probe is only available when @code{malloc} is configured
-to use per-thread arenas.  The argument @var{$arg1} holds a pointer to
-the selected arena.
-@end deftp
-
-@deftp Probe memory_arena_reuse_realloc (void *@var{$arg1})
-This probe is triggered within @code{realloc}, as the arena of the
-current thread is changed to match that in which the given address was
-allocated.  This probe is @emph{not} available when @code{malloc} is
-configured to use per-thread arenas.  The argument @var{$arg1} holds a
-pointer to the newly-selected arena.
+function.  The argument @var{$arg1} holds a pointer to the selected arena.
 @end deftp
 
 @deftp Probe memory_mallopt (int @var{$arg1}, int @var{$arg2})
@@ -237,8 +211,7 @@ This probe is triggered shortly after the @code{memory_mallopt} probe,
 when the parameter to be changed is @code{M_ARENA_TEST}, and the
 requested value is in an acceptable range.  Argument @var{$arg1} is the
 requested value, and @var{$arg2} is the previous value of this
-@code{malloc} parameter.  This probe is only available when per-thread
-arenas are enabled.
+@code{malloc} parameter.
 @end deftp
 
 @deftp Probe memory_mallopt_arena_max (int @var{$arg1}, int @var{$arg2})
@@ -246,8 +219,7 @@ This probe is triggered shortly after the @code{memory_mallopt} probe,
 when the parameter to be changed is @code{M_ARENA_MAX}, and the
 requested value is in an acceptable range.  Argument @var{$arg1} is the
 requested value, and @var{$arg2} is the previous value of this
-@code{malloc} parameter.  This probe is only available when per-thread
-arenas are enabled.
+@code{malloc} parameter.
 @end deftp
 
 @deftp Probe memory_mallopt_free_dyn_thresholds (int @var{$arg1}, int @var{$arg2})

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog          |    5 +++++
 manual/probes.texi |   40 ++++++----------------------------------
 2 files changed, 11 insertions(+), 34 deletions(-)


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