Re: Strange finding about kernel samepage merging

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

To: Jidong Xiao <jidong.xiao@xxxxxxxxx>
Subject: Re: Strange finding about kernel samepage merging
From: Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
Date: Mon, 6 Feb 2012 21:35:44 -0600
Cc: linux-mm@xxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
Delivered-to: linux-mm-outgoing@xxxxxxxxx
Delivered-to: int-list-linux-mm@xxxxxxxxx
Delivered-to: linux-mm@xxxxxxxxx
In-reply-to: <CAG4AFWaXVEHP+YikRSyt8ky9XsiBnwQ3O94Bgc7-b7nYL_2PZQ@mail.gmail.com>

My guess is you end up with 2 copies of each page on the guest: the copy in the guest's page cache, and the copy in the buffer you allocated. From the perspective of the host this all looks like anonymous memory, so ksm merges the pages.

Follow-Ups:
- Re: Strange finding about kernel samepage merging
  - From: Jidong Xiao

References:
- Strange finding about kernel samepage merging
  - From: Jidong Xiao

Prev by Date: Re: [PATCH 3/3] move hugepage test examples to tools/testing/selftests/vm
Next by Date: Re: Strange finding about kernel samepage merging
Previous by thread: Strange finding about kernel samepage merging
Next by thread: Re: Strange finding about kernel samepage merging
Index(es):
- Date
- Thread

[Index of Archives] [Linux ARM Kernel] [Linux ARM] [Linux Omap] [Fedora ARM] [IETF Annouce] [Bugtraq] [Linux] [Linux OMAP] [Linux MIPS] [ECOS] [Asterisk Internet PBX] [Linux API]