diff options
Diffstat (limited to 'nptl/sysdeps/i386/i686/Makefile')
| -rw-r--r-- | nptl/sysdeps/i386/i686/Makefile | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/nptl/sysdeps/i386/i686/Makefile b/nptl/sysdeps/i386/i686/Makefile index 493a7ec49f..137c0a2f0c 100644 --- a/nptl/sysdeps/i386/i686/Makefile +++ b/nptl/sysdeps/i386/i686/Makefile @@ -18,6 +18,15 @@ # 02111-1307 USA. ifeq ($(subdir),nptl) -# For P4 processors we color the stack in 128 bit steps. -CFLAGS-pthread_create.c += -DCOLORING_INCREMENT=128 +# It turns out that stack coloring is in general not good on P4s. Some +# applications will benefit. We will probably have a configuration option +# at some point. Enabling coloring can be done with +# +# -DCOLORING_INCREMENT=128 +# +# What is useful is to avoid the 64k aliasing problem which reliably +# happens if all stacks use sizes which are a multiple of 64k. Tell +# the stack allocator to disturb this by allocation one more page if +# necessary. +CFLAGS-pthread_create.c += -DMULTI_PAGE_ALIASING=65536 endif |