X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86%2Fbackend-parms.lisp;h=16ea497f4a3608521b01c1d9101dfaca0e9176d0;hb=d306e2d23b38487488eb93881dad836e439e0c77;hp=7414281959d09b1b659ecb5b37df3877535b0953;hpb=4e5668af19abcf84587bf3f7a1c4294cd92c94a7;p=sbcl.git

diff --git a/src/compiler/x86/backend-parms.lisp b/src/compiler/x86/backend-parms.lisp
index 7414281..16ea497 100644
--- a/src/compiler/x86/backend-parms.lisp
+++ b/src/compiler/x86/backend-parms.lisp
@@ -33,7 +33,7 @@
 ;;; compatible systems to return different values for getpagesize().
 ;;; -- JES, 2007-01-06
 (eval-when (:compile-toplevel :load-toplevel :execute)
-  (setf *backend-page-size* 4096))
+  (setf *backend-page-bytes* 4096))
 ;;; comment from CMU CL:
 ;;;
 ;;;   in case we ever wanted to do this for Windows NT..
@@ -43,8 +43,17 @@
 ;;;   page size is 512, but that doesn't do us a whole lot of good.
 ;;;   Effectively, the page size is 64K.
 ;;;
-;;;   would be: (setf *backend-page-size* 65536)
+;;;   would be: (setf *backend-page-bytes* 65536)
 
-;;; The size in bytes of the GENCGC pages. Should be a multiple of the
-;;; architecture code size.
-(def!constant gencgc-page-size *backend-page-size*)
+;;; The size in bytes of GENCGC cards, i.e. the granularity at which
+;;; writes to old generations are logged.  With mprotect-based write
+;;; barriers, this must be a multiple of the OS page size.
+(def!constant gencgc-card-bytes *backend-page-bytes*)
+;;; The minimum size of new allocation regions.  While it doesn't
+;;; currently make a lot of sense to have a card size lower than
+;;; the alloc granularity, it will, once we are smarter about finding
+;;; the start of objects.
+(def!constant gencgc-alloc-granularity 0)
+;;; The minimum size at which we release address ranges to the OS.
+;;; This must be a multiple of the OS page size.
+(def!constant gencgc-release-granularity *backend-page-bytes*)