On Thu, May 8, 2008 at 12:10 AM, Ray Lee <ray-lk@xxxxxxxxxxxxx> wrote:
> <shrug> Well, if there's one, then obviously there isn't. I'd assumed
> it was a per-dentry overhead.
Good. If the binary application interface must be kept,
> $ cat /proc/sys/fs/dentry-state
> 122104 115846 45 0 0 0
and to shrink dentry_stat can only save 16 bytes, there's no need to do this,
but the Documentation/ as this should be fixed?
Documentation/filesystems/proc.txt:
dentry-state
------------
Status of the directory cache. Since directory entries are dynamically
allocated and deallocated, this file indicates the current status. It holds
six values, in which the last two are not used and are always zero. The others
are listed in table 2-1.
Table 2-1: Status files of the directory cache
..............................................................................
File Content
nr_dentry Almost always zero
nr_unused Number of unused cache entries
age_limit
in seconds after the entry may be reclaimed, when memory is short
want_pages internally
..............................................................................
the age_limit and want_pages should be marked outdated and not used anymore,
But there's still one question:
1. Is age_limit always 45? Or the binary application interface would
expect it always 45?
Can we change dentry_stat with 6 int values all initialized with
zero? Then the docs can be
fixed with last four values not used and are always zero.
--
Cheng
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
