Merge branch 'sp/mmap'

* sp/mmap: (27 commits)
  Spell default packedgitlimit slightly differently
  Increase packedGit{Limit,WindowSize} on 64 bit systems.
  Update packedGit config option documentation.
  mmap: set FD_CLOEXEC for file descriptors we keep open for mmap()
  pack-objects: fix use of use_pack().
  Fix random segfaults in pack-objects.
  Cleanup read_cache_from error handling.
  Replace mmap with xmmap, better handling MAP_FAILED.
  Release pack windows before reporting out of memory.
  Default core.packdGitWindowSize to 1 MiB if NO_MMAP.
  Test suite for sliding window mmap implementation.
  Create pack_report() as a debugging aid.
  Support unmapping windows on 'temporary' packfiles.
  Improve error message when packfile mmap fails.
  Ensure core.packedGitWindowSize cannot be less than 2 pages.
  Load core configuration in git-verify-pack.
  Fully activate the sliding window pack access.
  Unmap individual windows rather than entire files.
  Document why header parsing won't exceed a window.
  Loop over pack_windows when inflating/accessing data.
  ...

Conflicts:

	cache.h
	pack-check.c

1 files changed, 60 insertions, 0 deletions

diff --git a/t/t5301-sliding-window.sh b/t/t5301-sliding-window.sh
new file mode 100755
index 000000000..5a7232a57
--- /dev/null
+++ b/t/t5301-sliding-window.sh
@@ -0,0 +1,60 @@
+#!/bin/sh
+#
+# Copyright (c) 2006 Shawn Pearce
+#
+
+test_description='mmap sliding window tests'
+. ./test-lib.sh
+
+test_expect_success \
+    'setup' \
+    'rm -f .git/index*
+     for i in a b c
+     do
+         echo $i >$i &&
+         dd if=/dev/urandom bs=32k count=1 >>$i &&
+         git-update-index --add $i || return 1
+     done &&
+     echo d >d && cat c >>d && git-update-index --add d &&
+     tree=`git-write-tree` &&
+     commit1=`git-commit-tree $tree </dev/null` &&
+     git-update-ref HEAD $commit1 &&
+     git-repack -a -d &&
+     test "`git-count-objects`" = "0 objects, 0 kilobytes" &&
+     pack1=`ls .git/objects/pack/*.pack` &&
+     test -f "$pack1"'
+
+test_expect_success \
+    'verify-pack -v, defaults' \
+    'git-verify-pack -v "$pack1"'
+
+test_expect_success \
+    'verify-pack -v, packedGitWindowSize == 1 page' \
+    'git-repo-config core.packedGitWindowSize 512 &&
+     git-verify-pack -v "$pack1"'
+
+test_expect_success \
+    'verify-pack -v, packedGit{WindowSize,Limit} == 1 page' \
+    'git-repo-config core.packedGitWindowSize 512 &&
+     git-repo-config core.packedGitLimit 512 &&
+     git-verify-pack -v "$pack1"'
+
+test_expect_success \
+    'repack -a -d, packedGit{WindowSize,Limit} == 1 page' \
+    'git-repo-config core.packedGitWindowSize 512 &&
+     git-repo-config core.packedGitLimit 512 &&
+     commit2=`git-commit-tree $tree -p $commit1 </dev/null` &&
+     git-update-ref HEAD $commit2 &&
+     git-repack -a -d &&
+     test "`git-count-objects`" = "0 objects, 0 kilobytes" &&
+     pack2=`ls .git/objects/pack/*.pack` &&
+     test -f "$pack2"
+     test "$pack1" \!= "$pack2"'
+
+test_expect_success \
+    'verify-pack -v, defaults' \
+    'git-repo-config --unset core.packedGitWindowSize &&
+     git-repo-config --unset core.packedGitLimit &&
+     git-verify-pack -v "$pack2"'
+
+test_done