Re: [RFC][PATCH 0/7][memcg] towards I/O aware memory cgroup

From: Balbir Singh
Date: Wed Jul 28 2010 - 10:42:44 EST

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> [2010-07-27 16:51:55]:

> From a view of patch management, this set is a mixture of a few features for
> memcg, and I should divide them to some groups. But, at first, I'd like to
> show the total view. This set is consists from 5 sets. Main purpose is
> create a room in page_cgroup for I/O tracking and add light-weight access method
> for file-cache related accounting.
> 1. An virtual-indexed array.
> 2,3. Use virtual-indexed array for id-to-memory_cgroup detection.
> 4. modify page_cgroup to use ID instead of pointer, this gives us enough
> spaces for further memory tracking.

Yes, this is good, I've been meaning to merge the flags and the
pointer. Thanks for looking into this.

> 5,6 Use light-weight locking mechanism for file related accounting.
> 7. use spin_lock instead of bit_spinlock.
> As a function, patch 5,6 can be an independent patch and I'll accept
> reordering series of patch if someone requests.
> But we'll need all, I think.
> (irq_save for patch 7 will be required later.)

Three Cheers,
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