From: Rik van Riel <riel@redhat.com>
To: Ying Han <yinghan@google.com>
Cc: Avi Kivity <avi@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.cz>,
Johannes Weiner <hannes@cmpxchg.org>, Mel Gorman <mel@csn.ul.ie>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Hillf Danton <dhillf@gmail.com>, Hugh Dickins <hughd@google.com>,
Dan Magenheimer <dan.magenheimer@oracle.com>,
linux-mm@kvack.org, kvm@vger.kernel.org,
Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: [PATCH] kvm: don't call mmu_shrinker w/o used_mmu_pages
Date: Mon, 23 Apr 2012 12:48:35 -0400 [thread overview]
Message-ID: <4F9587E3.6090802@redhat.com> (raw)
In-Reply-To: <CALWz4izsOs_-gjR7VV7CyFpzqTQB7sTB4jr7WFBDUXLodZA5yQ@mail.gmail.com>
On 04/23/2012 12:40 PM, Ying Han wrote:
> Avi, does this patch help the case as you mentioned above, where kvm
> module is loaded but no virtual machines are present ? Why we have to
> walk the empty while holding the spinlock?
It might help marginally, but rather than defending
the patch, it might be more useful to try finding a
solution to the problem Mike and Eric are triggering.
How can we prevent the code from taking the lock and
throwing out EPT/NPT pages when there is no real need
to, and they will be faulted back in soon anyway?
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next prev parent reply other threads:[~2012-04-23 16:48 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-13 22:38 [PATCH] kvm: don't call mmu_shrinker w/o used_mmu_pages Ying Han
2012-04-14 11:44 ` Hillf Danton
2012-04-16 16:43 ` Ying Han
2012-04-20 22:11 ` Andrew Morton
2012-04-20 22:11 ` Andrew Morton
2012-04-20 22:53 ` Rik van Riel
2012-04-20 23:07 ` Ying Han
2012-04-21 1:56 ` Takuya Yoshikawa
2012-04-21 2:15 ` Mike Waychison
2012-04-21 2:29 ` Takuya Yoshikawa
2012-04-21 2:29 ` Takuya Yoshikawa
2012-04-21 2:48 ` Mike Waychison
2012-04-21 2:48 ` Mike Waychison
2012-04-22 9:16 ` Avi Kivity
2012-04-22 19:05 ` Eric Northup
2012-04-23 8:37 ` Avi Kivity
2012-04-22 9:04 ` Avi Kivity
2012-04-22 9:35 ` Avi Kivity
2012-04-23 16:40 ` Ying Han
2012-04-23 16:48 ` Rik van Riel [this message]
2012-04-23 16:57 ` Avi Kivity
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