Re: [PATCH,boehm-gc] Use mmap instead of brk on kfreebsd & hurd too

[Thomas Schwinge]

Hi!

On Sun, 31 Aug 2014 17:20:04 +0200, Samuel Thibault <samuel.thibault@gnu.org> 
wrote:
> Please use mmap instead of brk on kfreebsd and hurd too.
> Also, using anonymous memory is faster on the Hurd.

> [patch]

Thanks; finally committed in r234534:

commit 04a4d1ce0425912054b6f8db5bc15029bf87e055
Author: tschwinge <tschwinge@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Tue Mar 29 21:05:07 2016 +0000

    [Hurd, kFreeBSD] boehm-gc: Use mmap instead of brk
    
        boehm-gc/
        * configure.host: Set gc_use_mmap on *-kfreebsd-gnu* and *-gnu*.
        * include/private/gcconfig.h [HURD && USE_MMAP]: Define
        USE_MMAP_ANON.
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@234534 
138bc75d-0d04-0410-961f-82ee72b054a4
---
 boehm-gc/ChangeLog                  | 6 ++++++
 boehm-gc/configure.host             | 2 +-
 boehm-gc/include/private/gcconfig.h | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git boehm-gc/ChangeLog boehm-gc/ChangeLog
index c41734a..6896c67 100644
--- boehm-gc/ChangeLog
+++ boehm-gc/ChangeLog
@@ -1,3 +1,9 @@
+2016-03-29  Samuel Thibault  <samuel.thibault@ens-lyon.org>
+
+       * configure.host: Set gc_use_mmap on *-kfreebsd-gnu* and *-gnu*.
+       * include/private/gcconfig.h [HURD && USE_MMAP]: Define
+       USE_MMAP_ANON.
+
 2016-03-16  Andreas Schwab  <schwab@suse.de>
 
        * include/private/gcconfig.h [AARCH64] (ALIGNMENT, CPP_WORDSZ):
diff --git boehm-gc/configure.host boehm-gc/configure.host
index 97f4dac..229a038 100644
--- boehm-gc/configure.host
+++ boehm-gc/configure.host
@@ -41,7 +41,7 @@ else
 fi
 
 case "${host}" in
-  *-linux*)
+  *-linux*|*-kfreebsd-gnu*|*-gnu*)
     gc_use_mmap=yes
     ;;
 esac
diff --git boehm-gc/include/private/gcconfig.h 
boehm-gc/include/private/gcconfig.h
index aa81f15..44b9d7d 100644
--- boehm-gc/include/private/gcconfig.h
+++ boehm-gc/include/private/gcconfig.h
@@ -2137,7 +2137,7 @@
 #   endif
 # endif
 
-#if defined(LINUX) && defined(USE_MMAP)
+#if (defined(LINUX) || defined(HURD)) && defined(USE_MMAP)
     /* The kernel may do a somewhat better job merging mappings etc.   */
     /* with anonymous mappings.                                                
*/
 #   define USE_MMAP_ANON


Grüße
 Thomas

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