Re: [RFC][PATCH] vmscan: don't export nr_saved_scan in/proc/zoneinfo

[Andrew Morton]

On Sat, 2 May 2009 10:47:19 +0800
Wu Fengguang <fengguang.wu@xxxxxxxxx> wrote:

> The lru->nr_saved_scan's are not meaningful counters for even kernel
> developers.  They typically are smaller than 32 and are always 0 for
> large lists. So remove them from /proc/zoneinfo.
> 
> Hopefully this interface change won't break too many scripts.
> /proc/zoneinfo is too unstructured to be script friendly, and I wonder
> the affected scripts - if there are any - are still bleeding since the
> not long ago commit "vmscan: split LRU lists into anon & file sets",
> which also touched the "scanned" line :)
> 
> If we are to re-export accumulated vmscan counts in the future, they
> can go to new lines in /proc/zoneinfo instead of the current form, or
> to /sys/devices/system/node/node0/meminfo?
> 

/proc/zoneinfo is unsalvageable :( Shifting future work over to
/sys/devices/system/node/nodeN/meminfo and deprecating /proc/zoneinfo
sounds good to me.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/