[pypy-commit] stmgc default: comment fixes

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: 
Changeset: r890:24a6732aec1d
Date: 2014-02-27 12:25 +0100
http://bitbucket.org/pypy/stmgc/changeset/24a6732aec1d/

Log:	comment fixes

diff --git a/c7/stm/gcpage.h b/c7/stm/gcpage.h
--- a/c7/stm/gcpage.h
+++ b/c7/stm/gcpage.h
@@ -3,12 +3,11 @@
    complete pages, one at a time, which uniformly contain objects of
    size "8 * N" for some N in range(2, GC_N_SMALL_REQUESTS).  We are
    taking from the lowest addresses "large" objects, which are at least
-   128 bytes long, allocated by largemalloc.c.  The limit was picked
-   from a run a PyPy, showing that (in this case) the number of
-   allocations of at least 128 bytes is a lot below 1%.
+   288 bytes long, allocated by largemalloc.c.  The limit is the same
+   as used in PyPy's default GC.
 */
 
-#define GC_N_SMALL_REQUESTS    16
+#define GC_N_SMALL_REQUESTS    36
 
 
 static char *uninitialized_page_start;   /* within segment 0 */
diff --git a/c7/stm/largemalloc.c b/c7/stm/largemalloc.c
--- a/c7/stm/largemalloc.c
+++ b/c7/stm/largemalloc.c
@@ -36,9 +36,9 @@
 
     /* The chunk has a total size of 'size'.  It is immediately followed
        in memory by another chunk.  This list ends with the last "chunk"
-       being actually only one word long, 'size_t prev_size'.  Both this
-       last chunk and the theoretical chunk before the first one are
-       considered "not free". */
+       being actually only two words long, with END_MARKER as 'size'.
+       Both this last chunk and the theoretical chunk before the first
+       one are considered "not free". */
 } mchunk_t;
 
 #define FLAG_SORTED          1
@@ -64,7 +64,7 @@
 
 /* The free chunks are stored in "bins".  Each bin is a doubly-linked
    list of chunks.  There are 84 bins, with largebin_index() giving the
-   correspondence between sizes are bin indices.
+   correspondence between sizes and bin indices.
 
    Each free chunk is preceeded in memory by a non-free chunk (or no
    chunk at all).  Each free chunk is followed in memory by a non-free