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Date: Thu, 19 Mar 2015 13:12:05 +0300 From: Cyrill Gorcunov <gorcunov@...il.com> To: Vladimir Davydov <vdavydov@...allels.com> Cc: Andrew Morton <akpm@...ux-foundation.org>, Johannes Weiner <hannes@...xchg.org>, Michal Hocko <mhocko@...e.cz>, Greg Thelen <gthelen@...gle.com>, Michel Lespinasse <walken@...gle.com>, David Rientjes <rientjes@...gle.com>, Pavel Emelyanov <xemul@...allels.com>, Jonathan Corbet <corbet@....net>, linux-api@...r.kernel.org, linux-doc@...r.kernel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH 3/3] mm: idle memory tracking On Wed, Mar 18, 2015 at 11:44:36PM +0300, Vladimir Davydov wrote: > Knowing the portion of memory that is not used by a certain application > or memory cgroup (idle memory) can be useful for partitioning the system > efficiently. Currently, the only means to estimate the amount of idle > memory provided by the kernel is /proc/PID/clear_refs. However, it has > two serious shortcomings: > > - it does not count unmapped file pages > - it affects the reclaimer logic > > This patch attempts to provide the userspace with the means to track > idle memory without the above mentioned limitations. ... > +static void set_mem_idle(void) > +{ > + int nid; > + > + for_each_online_node(nid) > + set_mem_idle_node(nid); > +} Vladimir, might we need get_online_mems/put_online_mems here, or if node gets offline this wont be a problem? (Asking because i don't know). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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