diff --git a/remotefilelog/__init__.py b/remotefilelog/__init__.py
--- a/remotefilelog/__init__.py
+++ b/remotefilelog/__init__.py
@@ -23,10 +23,28 @@
       days after which it is no longer prefetched.
     ``remotefilelog.prefetchdelay`` specifies delay between background
       prefetches in seconds after operations that change the working copy parent
+    ``remotefilelog.data.gencountlimit`` constraints the minimum number of data
+      pack files required to be considered part of a generation. In particular,
+      minimum number of packs files > gencountlimit.
+    ``remotefilelog.data.generations`` list for specifying the lower bound of
+      each generation of the data pack files. For example, list ['100MB','1MB']
+      or ['1MB', '100MB'] will lead to three generations: [0, 1MB), [
+      1MB, 100MB) and [100MB, infinity).
     ``remotefilelog.data.maxrepackpacks`` the maximum number of pack files to
       include in an incremental data repack.
+    ``remotefilelog.data.repacksizelimit`` the maximum total size of pack files
+      to include in an incremental data repack.
+    ``remotefilelog.history.gencountlimit`` constraints the minimum number of
+      history pack files required to be considered part of a generation. In
+      particular, minimum number of packs files > gencountlimit.
+    ``remotefilelog.history.generations`` list for specifying the lower bound of
+      each generation of the history pack files. For example, list [
+      '100MB', '1MB'] or ['1MB', '100MB'] will lead to three generations: [
+      0, 1MB), [1MB, 100MB) and [100MB, infinity).
     ``remotefilelog.history.maxrepackpacks`` the maximum number of pack files to
       include in an incremental history repack.
+    ``remotefilelog.history.repacksizelimit`` the maximum total size of pack
+      files to include in an incremental history repack.
 """
 
 from . import fileserverclient, remotefilelog, remotefilectx, shallowstore
diff --git a/remotefilelog/repack.py b/remotefilelog/repack.py
--- a/remotefilelog/repack.py
+++ b/remotefilelog/repack.py
@@ -294,7 +294,7 @@
                 break
 
     # Steps for picking what packs to repack:
-    # 1. Pick the largest generation with >2 pack files.
+    # 1. Pick the largest generation with > gencountlimit pack files.
     # 2. Take the smallest three packs.
     # 3. While total-size-of-packs < repacksizelimit: add another pack
 
diff --git a/tests/test-check-config-hg.t b/tests/test-check-config-hg.t
--- a/tests/test-check-config-hg.t
+++ b/tests/test-check-config-hg.t
@@ -51,7 +51,6 @@
   undocumented: rage.fastmanifestcached (bool)
   undocumented: remotefilelog.backgroundrepack (bool)
   undocumented: remotefilelog.cachegroup (str)
-  undocumented: remotefilelog.data.gencountlimit (int) [2]
   undocumented: remotefilelog.debug (bool)
   undocumented: remotefilelog.excludepattern (list)
   undocumented: remotefilelog.fastdatapack (bool)
@@ -59,7 +58,6 @@
   undocumented: remotefilelog.fetchwarning (str)
   undocumented: remotefilelog.getfilesstep (int) [10000]
   undocumented: remotefilelog.getfilestype (str) ['optimistic']
-  undocumented: remotefilelog.history.gencountlimit (int) [2]
   undocumented: remotefilelog.includepattern (list)
   undocumented: remotefilelog.pullprefetch (str)
   undocumented: remotefilelog.reponame (str)