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由 Mikulas Patocka 提交于
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: NMikulas Patocka <mpatocka@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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