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| author | Mikulas Patocka <mpatocka@redhat.com> | 2011-07-21 19:59:22 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-22 17:43:30 -0700 |
| commit | 7f9838fd01833ffb30177d964983076924344c9e (patch) | |
| tree | 95487aa8962c0baaed05375f739a4a16a566a388 /fs/sysfs/sysfs.h | |
| parent | 86028619b9f653a30f5aa0d331fdedd899a1eea5 (diff) | |
| download | blackbird-op-linux-7f9838fd01833ffb30177d964983076924344c9e.tar.gz blackbird-op-linux-7f9838fd01833ffb30177d964983076924344c9e.zip | |
sysfs: count subdirectories
sysfs: count subdirectories
This patch introduces a subdirectory counter for each sysfs directory.
Without the patch, sysfs_refresh_inode would walk all entries of the directory
to calculate the number of subdirectories.
This patch improves time of "ls -la /sys/block" when there are 10000 block
devices from 9 seconds to 0.19 seconds.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/sysfs/sysfs.h')
| -rw-r--r-- | fs/sysfs/sysfs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h index 845ab3ad229d..6348e2c753f6 100644 --- a/fs/sysfs/sysfs.h +++ b/fs/sysfs/sysfs.h @@ -19,6 +19,8 @@ struct sysfs_elem_dir { struct kobject *kobj; /* children list starts here and goes through sd->s_sibling */ struct sysfs_dirent *children; + + unsigned long subdirs; }; struct sysfs_elem_symlink { |
