Messages in this thread | | | Date | Tue, 09 Apr 2013 18:20:09 +0800 | From | Simon Jeons <> | Subject | Re: [PATCH] mm: page_alloc: Avoid marking zones full prematurely after zone_reclaim() |
| |
Hi Michal, On 04/09/2013 06:14 PM, Michal Hocko wrote: > On Tue 09-04-13 18:05:30, Simon Jeons wrote: > [...] >>> I try this in v3.9-rc5: >>> dd if=/dev/sda of=/dev/null bs=1MB >>> 14813+0 records in >>> 14812+0 records out >>> 14812000000 bytes (15 GB) copied, 105.988 s, 140 MB/s >>> >>> free -m -s 1 >>> >>> total used free shared buffers >>> cached >>> Mem: 7912 1181 6731 0 663 239 >>> -/+ buffers/cache: 277 7634 >>> Swap: 8011 0 8011 >>> >>> It seems that almost 15GB copied before I stop dd, but the used >>> pages which I monitor during dd always around 1200MB. Weird, why? >>> >> Sorry for waste your time, but the test result is weird, is it? > I am not sure which values you have been watching but you have to > realize that you are reading a _partition_ not a file and those pages > go into buffers rather than the page chache.
buffer cache are contained in page cache, is it? Which value I should watch?
| |