diff options
author | Dimitri John Ledkov <xnox@ubuntu.com> | 2016-08-11 12:45:00 +0100 |
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committer | Dimitri John Ledkov <xnox@ubuntu.com> | 2016-08-11 12:45:00 +0100 |
commit | ffd998be34a1a3d208106d051e85058ff9ac9667 (patch) | |
tree | 3f93a4a7362dcbdbadf5086e9404dc58ea22200a /cmds-filesystem.c | |
parent | 3d69435ee3292b4b1db2d61c4784789d75883821 (diff) |
Imported Upstream version 4.7
Diffstat (limited to 'cmds-filesystem.c')
-rw-r--r-- | cmds-filesystem.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/cmds-filesystem.c b/cmds-filesystem.c index 9392a30b..00e4bfe4 100644 --- a/cmds-filesystem.c +++ b/cmds-filesystem.c @@ -968,7 +968,7 @@ static const char * const cmd_filesystem_defrag_usage[] = { "-f flush data to disk immediately after defragmenting", "-s start defragment only from byte onward", "-l len defragment only up to len bytes", - "-t size target extent size hint", + "-t size target extent size hint (default: 32M)", NULL }; @@ -1029,7 +1029,7 @@ static int cmd_filesystem_defrag(int argc, char **argv) int flush = 0; u64 start = 0; u64 len = (u64)-1; - u64 thresh = 0; + u64 thresh; int i; int recursive = 0; int ret = 0; @@ -1037,11 +1037,17 @@ static int cmd_filesystem_defrag(int argc, char **argv) int compress_type = BTRFS_COMPRESS_NONE; DIR *dirstream; + /* + * Kernel has a different default (256K) that is supposed to be safe, + * but it does not defragment very well. The 32M will likely lead to + * better results and is independent of the kernel default. + */ + thresh = 32 * 1024 * 1024; + defrag_global_errors = 0; defrag_global_verbose = 0; defrag_global_errors = 0; defrag_global_fancy_ioctl = 0; - optind = 1; while(1) { int c = getopt(argc, argv, "vrc::fs:l:t:"); if (c < 0) |