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authorRichard Purdie <richard.purdie@linuxfoundation.org>2015-02-20 17:41:05 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2015-04-17 22:39:30 +0100
commit9c2e4e50a8cf48d6a0948f33559b5ecaeaf655c8 (patch)
tree8e1acf6b4e1b084291c0e84c652a1ac510b900d2
parente8a260c9b8c3f63253da18a44a41146069fd05bd (diff)
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e2fsprogs: Add a patch to speedup mkfs
See the patch description, this adds a tweak to an algorithm to improve core-image-sato-sdk mkfs time from over 8 minutes to about 35s. Needs discussion upstream but seems reasonable for our uses of it. (From OE-Core rev: 468fa9a7fac86bb0fcd3cbd18dc1492b57ca25f3) (From OE-Core rev: 5aee64c9577affc35ad1555f2a7eb9d287b9fda4) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Armin Kuster <akuster808@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rw-r--r--meta/recipes-devtools/e2fsprogs/e2fsprogs/cache_inode.patch52
-rw-r--r--meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb1
2 files changed, 53 insertions, 0 deletions
diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs/cache_inode.patch b/meta/recipes-devtools/e2fsprogs/e2fsprogs/cache_inode.patch
new file mode 100644
index 0000000000..f9ef8e5f26
--- /dev/null
+++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs/cache_inode.patch
@@ -0,0 +1,52 @@
+The comment to this function says:
+
+"""
+ * Stupid algorithm --- we now just search forward starting from the
+ * goal. Should put in a smarter one someday....
+"""
+
+This adds in a rather hacky algorthim which starts where we finished
+searching previously using a static variable rather than starting
+from scratch if a hint isn't provided.
+
+This was after noticing that mkfs.ext4 -F X -d Y was spending *lots*
+of time in ext2fs_new_block2 called from ext2fs_bmap from ext2fs_file_write().
+
+Numbers wise, this took a core-image-sato-sdk mkfs time from over
+8 minutes to around 35 seconds.
+
+Upstream-Status: Pending
+
+RP 2015/02/20
+
+Index: e2fsprogs-1.42.9/lib/ext2fs/alloc.c
+===================================================================
+--- e2fsprogs-1.42.9.orig/lib/ext2fs/alloc.c
++++ e2fsprogs-1.42.9/lib/ext2fs/alloc.c
+@@ -160,6 +160,8 @@ errcode_t ext2fs_new_inode(ext2_filsys f
+ return 0;
+ }
+
++static blk64_t last_goal = 0;
++
+ /*
+ * Stupid algorithm --- we now just search forward starting from the
+ * goal. Should put in a smarter one someday....
+@@ -170,6 +172,9 @@ errcode_t ext2fs_new_block2(ext2_filsys
+ blk64_t i;
+ int c_ratio;
+
++ if (!goal)
++ goal = last_goal;
++
+ EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+ if (!map)
+@@ -194,6 +199,7 @@ errcode_t ext2fs_new_block2(ext2_filsys
+
+ if (!ext2fs_fast_test_block_bitmap2(map, i)) {
+ *ret = i;
++ last_goal = i;
+ return 0;
+ }
+ i = (i + c_ratio) & ~(c_ratio - 1);
diff --git a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb
index 1fb4a6cd85..2dd3d547df 100644
--- a/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb
+++ b/meta/recipes-devtools/e2fsprogs/e2fsprogs_1.42.9.bb
@@ -19,6 +19,7 @@ SRC_URI += "file://acinclude.m4 \
file://0012-Fix-musl-build-failures.patch \
file://0001-e2fsprogs-fix-cross-compilation-problem.patch \
file://misc-mke2fs.c-return-error-when-failed-to-populate-fs.patch \
+ file://cache_inode.patch \
"
SRC_URI[md5sum] = "3f8e41e63b432ba114b33f58674563f7"