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| author | Andreas Klebinger <klebinger.andreas@gmx.at> | 2020-04-06 13:35:23 +0200 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2020-06-25 03:54:37 -0400 |
| commit | 03a708ba8e8c323b07d8d2e0115d6eb59987cc02 (patch) | |
| tree | f15859999eaf961053fbeacc044e993b8e8a38d8 /configure.ac | |
| parent | a1f34d37b47826e86343e368a5c00f1a4b1f2bce (diff) | |
| download | haskell-03a708ba8e8c323b07d8d2e0115d6eb59987cc02.tar.gz | |
Enable large address space optimization on windows.
Starting with Win 8.1/Server 2012 windows no longer preallocates
page tables for reserverd memory eagerly, which prevented us from
using this approach in the past.
We also try to allocate the heap high in the memory space.
Hopefully this makes it easier to allocate things in the low
4GB of memory that need to be there. Like jump islands for the
linker.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index 84880d8cb4..070f7ce56c 100644 --- a/configure.ac +++ b/configure.ac @@ -1219,11 +1219,15 @@ if test "$ac_cv_sizeof_void_p" -eq 8 ; then if test "x$EnableLargeAddressSpace" = "xyes" ; then if test "$ghc_host_os" = "darwin" ; then use_large_address_space=yes - elif test "$ghc_host_os" = "openbsd" ; then - # as of OpenBSD 5.8 (2015), OpenBSD does not support mmap with MAP_NORESERVE. - # The flag MAP_NORESERVE is supported for source compatibility reasons, - # but is completely ignored by OS mmap - use_large_address_space=no + elif test "$ghc_host_os" = "openbsd" ; then + # as of OpenBSD 5.8 (2015), OpenBSD does not support mmap with MAP_NORESERVE. + # The flag MAP_NORESERVE is supported for source compatibility reasons, + # but is completely ignored by OS mmap + use_large_address_space=no + elif test "$ghc_host_os" = "mingw32" ; then + # as of Windows 8.1/Server 2012 windows does no longer allocate the page + # tabe for reserved memory eagerly. So we are now free to use LAS there too. + use_large_address_space=yes else AC_CHECK_DECLS([MAP_NORESERVE, MADV_FREE, MADV_DONTNEED],[],[], [ |