From: Johannes Weiner <jweiner@redhat.com>
To: Rajesh Ghanekar <rajeshsg@gmail.com>
Cc: linux-mm@kvack.org
Subject: Re: what protects page lru list?
Date: Sat, 20 Aug 2011 15:27:01 +0200 [thread overview]
Message-ID: <20110820132701.GA29322@redhat.com> (raw)
In-Reply-To: <CAOn_VZYLOG9ctDomhMzyk19jVeKWWMvftvjyXRwfCyNn+4jinA@mail.gmail.com>
On Sat, Aug 20, 2011 at 02:11:53AM +0530, Rajesh Ghanekar wrote:
> Hi,
> I am confused with what protects page->lru? Is it both zone->lru_lock or
> zone->lock? I can see it being protected either by lru_lock or lock.
It's not so much about page->lru but the actual list the page is
linked to.
The zone's lists of unallocated pages are protected by zone->lock,
while the LRU lists with the pages for userspace are protected by
zone->lru_lock.
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next prev parent reply other threads:[~2011-08-20 13:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-19 20:41 what protects page lru list? Rajesh Ghanekar
2011-08-20 13:27 ` Johannes Weiner [this message]
2011-08-20 18:45 ` Rajesh Ghanekar
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