From patchwork Fri Oct 5 03:44:54 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [1/2] e2freefrag: use 64-bit rbtree bitmaps From: Theodore Ts'o X-Patchwork-Id: 189419 Message-Id: <1349408695-11661-1-git-send-email-tytso@mit.edu> To: Ext4 Developers List Cc: Theodore Ts'o Date: Thu, 4 Oct 2012 23:44:54 -0400 Enable the use of 64-bit bitmaps, so e2freefrag will work on file systems with the 64-bit feature enabled. In addition, enable the rbtree-based bitmaps, which significantly saves the amount of memory required (from 97 megs to 1.7 megs for an empty 3T file system) at the cost of additional CPU overhead (but we will claw back some of the additional CPU overhead in the next commit). Addresses-Google-Bug: 7269948 Signed-off-by: "Theodore Ts'o" --- misc/e2freefrag.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/misc/e2freefrag.c b/misc/e2freefrag.c index 30af43e..58f1ff5 100644 --- a/misc/e2freefrag.c +++ b/misc/e2freefrag.c @@ -249,13 +249,14 @@ static void collect_info(ext2_filsys fs, struct chunk_info *chunk_info, FILE *f) static void open_device(char *device_name, ext2_filsys *fs) { int retval; - int flag = EXT2_FLAG_FORCE; + int flag = EXT2_FLAG_FORCE | EXT2_FLAG_64BITS; retval = ext2fs_open(device_name, flag, 0, 0, unix_io_manager, fs); if (retval) { com_err(device_name, retval, "while opening filesystem"); exit(1); } + (*fs)->default_bitmap_type = EXT2FS_BMAP64_RBTREE; } #endif