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| author | Erik de Castro Lopo <erikd@mega-nerd.com> | 2015-08-25 11:33:32 +1000 |
|---|---|---|
| committer | Erik de Castro Lopo <erikd@mega-nerd.com> | 2015-08-26 06:54:05 +1000 |
| commit | fba724ccabd295fc37e71ba6c4f892822a831d19 (patch) | |
| tree | 4787a509c935ba6e64ef6436e405496de2fcf0ad | |
| parent | b78494eee787bdc0f9cc263b773638dc7db3482f (diff) | |
| download | haskell-fba724ccabd295fc37e71ba6c4f892822a831d19.tar.gz | |
configure.ac: Allow disabling of large-address-space
Recent changes (commit 0d1a8d09f4) for 64 bit platforms allowed GHC
to mmap one huge (currently 1 terrabyte) memory region from which to
do its own allocations. This is enabled by default, but it would be
nice (even just from the point of view of testing) to be able to
disable this at configure time.
Test Plan: configure and grep mk/config.h for USE_LARGE_ADDRESS_SPACE
Reviewers: austin, ezyang, bgamari, rwbarton
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D1170
GHC Trac Issues: #10791
| -rw-r--r-- | configure.ac | 42 |
1 files changed, 26 insertions, 16 deletions
diff --git a/configure.ac b/configure.ac index e7f91444fa..793ec0f61b 100644 --- a/configure.ac +++ b/configure.ac @@ -1066,24 +1066,34 @@ dnl runs out of paging file when we have multiple processes reserving dnl 1TB of address space, we get the following error: dnl VirtualAlloc MEM_RESERVE 1099512676352 bytes failed: The paging file is too small for this operation to complete. dnl + +AC_ARG_ENABLE(large-address-space, + [AC_HELP_STRING([--enable-large-address-space], + [Use a single large address space on 64 bit systems (enabled by default on 64 bit platforms)])], + EnableLargeAddressSpace=$enableval, + EnableLargeAddressSpace=yes +) + use_large_address_space=no if test "$ac_cv_sizeof_void_p" -eq 8 ; then - if test "$ghc_host_os" = "darwin" ; then - use_large_address_space=yes - else - AC_CHECK_DECLS([MAP_NORESERVE, MADV_FREE, MADV_DONTNEED],[],[], -[ -#include <unistd.h> -#include <sys/types.h> -#include <sys/mman.h> -#include <fcntl.h> -]) - if test "$ac_cv_have_decl_MAP_NORESERVE" = "yes" && - test "$ac_cv_have_decl_MADV_FREE" = "yes" || - test "$ac_cv_have_decl_MADV_DONTNEED" = "yes" ; then - use_large_address_space=yes - fi - fi + if test "x$EnableLargeAddressSpace" = "xyes" ; then + if test "$ghc_host_os" = "darwin" ; then + use_large_address_space=yes + else + AC_CHECK_DECLS([MAP_NORESERVE, MADV_FREE, MADV_DONTNEED],[],[], + [ + #include <unistd.h> + #include <sys/types.h> + #include <sys/mman.h> + #include <fcntl.h> + ]) + if test "$ac_cv_have_decl_MAP_NORESERVE" = "yes" && + test "$ac_cv_have_decl_MADV_FREE" = "yes" || + test "$ac_cv_have_decl_MADV_DONTNEED" = "yes" ; then + use_large_address_space=yes + fi + fi + fi fi if test "$use_large_address_space" = "yes" ; then AC_DEFINE([USE_LARGE_ADDRESS_SPACE], [1], [Enable single heap address space support]) |