diff --git a/hgext/graphlog.py b/hgext/graphlog.py
--- a/hgext/graphlog.py
+++ b/hgext/graphlog.py
@@ -250,7 +250,8 @@ def graphlog(ui, repo, path=None, **opts
     if path: # could be reset in canonpath
         revdag = graphmod.filerevs(repo, path, start, stop, limit)
     else:
-        stop = max(stop, start - limit + 1)
+        if limit is not None:
+            stop = max(stop, start - limit + 1)
         revdag = graphmod.revisions(repo, start, stop)
 
     displayer = show_changeset(ui, repo, opts, buffered=True)
@@ -260,7 +261,7 @@ def graphlog(ui, repo, path=None, **opts
 def graphrevs(repo, nodes, opts):
     limit = cmdutil.loglimit(opts)
     nodes.reverse()
-    if limit < sys.maxint:
+    if limit is not None:
         nodes = nodes[:limit]
     return graphmod.nodes(repo, nodes)
 
diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -95,7 +95,7 @@ def loglimit(opts):
             raise util.Abort(_('limit must be a positive integer'))
         if limit <= 0: raise util.Abort(_('limit must be positive'))
     else:
-        limit = sys.maxint
+        limit = None
     return limit
 
 def remoteui(src, opts):
diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -1924,7 +1924,7 @@ def incoming(ui, repo, source="default",
         displayer = cmdutil.show_changeset(ui, other, opts)
         count = 0
         for n in o:
-            if count >= limit:
+            if limit is not None and count >= limit:
                 break
             parents = [p for p in other.changelog.parents(n) if p != nullid]
             if opts.get('no_merges') and len(parents) == 2:
@@ -2179,7 +2179,7 @@ def outgoing(ui, repo, dest=None, **opts
     displayer = cmdutil.show_changeset(ui, repo, opts)
     count = 0
     for n in o:
-        if count >= limit:
+        if limit is not None and count >= limit:
             break
         parents = [p for p in repo.changelog.parents(n) if p != nullid]
         if opts.get('no_merges') and len(parents) == 2:
diff --git a/mercurial/graphmod.py b/mercurial/graphmod.py
--- a/mercurial/graphmod.py
+++ b/mercurial/graphmod.py
@@ -17,7 +17,6 @@ context of the graph returned. Type is a
 Data depends on type.
 """
 
-import sys
 from mercurial.node import nullrev
 
 CHANGESET = 'C'
@@ -37,7 +36,7 @@ def revisions(repo, start, stop):
         yield (cur, CHANGESET, ctx, sorted(parents))
         cur -= 1
 
-def filerevs(repo, path, start, stop, limit=sys.maxint):
+def filerevs(repo, path, start, stop, limit=None):
     """file cset DAG generator yielding (id, CHANGESET, ctx, [parentids]) tuples
 
     This generator function walks through the revision history of a single