Re: [PATCH] mm: add parameter to disable faultaround

2014-11-25 Thread Kirill A. Shutemov
On Tue, Nov 25, 2014 at 08:19:40PM +0900, Chanho Min wrote: > > > The faultaround improves the file read performance, whereas pages which > > > can be dropped by drop_caches are reduced. On some systems, The amount of > > > freeable pages under memory pressure is more important than read > > > perf

Re: [PATCH] mm: add parameter to disable faultaround

2014-11-25 Thread Andrew Morton
On Tue, 25 Nov 2014 20:19:40 +0900 "Chanho Min" wrote: > > > The faultaround improves the file read performance, whereas pages which > > > can be dropped by drop_caches are reduced. On some systems, The amount of > > > freeable pages under memory pressure is more important than read > > > perform

Re: [PATCH] mm: add parameter to disable faultaround

2014-11-24 Thread Andrew Morton
On Tue, 25 Nov 2014 15:51:58 +0900 Chanho Min wrote: > The faultaround improves the file read performance, whereas pages which > can be dropped by drop_caches are reduced. On some systems, The amount of > freeable pages under memory pressure is more important than read > performance. The faultar

[PATCH] mm: add parameter to disable faultaround

2014-11-24 Thread Chanho Min
The faultaround improves the file read performance, whereas pages which can be dropped by drop_caches are reduced. On some systems, The amount of freeable pages under memory pressure is more important than read performance. So It prefers to be selectable. This patch adds a new kernel cmdline param