Re: [PATCHv4 1/3] fs.c: support buffer cache allocations with gfp modifiers

2014-09-04 Thread Theodore Ts'o
On Thu, Sep 04, 2014 at 04:29:39PM +0900, Gioh Kim wrote: > A buffer cache is allocated from movable area > because it is referred for a while and released soon. > But some filesystems are taking buffer cache for a long time > and it can disturb page migration. > > New APIs are introduced to alloc

[PATCHv4 1/3] fs.c: support buffer cache allocations with gfp modifiers

2014-09-04 Thread Gioh Kim
A buffer cache is allocated from movable area because it is referred for a while and released soon. But some filesystems are taking buffer cache for a long time and it can disturb page migration. New APIs are introduced to allocate buffer cache with user specific flag. *_gfp APIs are for user want