.

wcfs/__init__.py

@@ -168,6 +168,7 @@ def close(wconn):
 def _pinner(wconn, ctx):
     # if pinner fails, wcfs will kill us.
     # log pinner exception so the error is not hidden.
+    # print to stderr as well as by default log does not print to there.
     def _():
         exc = sys.exc_info()[1]
         if exc is None:
@@ -275,7 +276,9 @@ def _remmapblk(mmap, blk, at):
         defer(fsfile.close)
         assert os.fstat(fsfile.fileno()).st_blksize == f.blksize  # FIXME assert
 
-    mm.map_into_ro(mmap.mem[(blk-mmap.blk_start)*blksize:][:blksize], fsfile.fileno(), blk*blksize)
+    mm.map_into_ro(
+            mmap.mem[(blk-mmap.blk_start)*f.blksize:][:f.blksize],
+            fsfile.fileno(), blk*f.blksize)
 
 
 # remmap_blk remmaps file[blk] in its place again.