Messages in this thread | | | Date | Wed, 3 Dec 2008 09:30:22 +0800 (CST) | From | peter meng <> | Subject | Re: question related page frame reclaim on embedded system |
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Hi,Kosaki
Thank you very much . I have another question about share memory . Assume a process create a share memory , seems the page that the process used can not be discard or swap out when they are no longer used by any process or no swap space .
1.whether the maped page of the share memory is persistent in system until system restart ? if not how page frame reclaiming process it ?
Thanks advanced Best Regards. Peter Meng
--- On Tue, 12/2/08, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:
> From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> > Subject: Re: question related page frame reclaim on embedded system > To: mengsanshui@yahoo.com.cn > Cc: kosaki.motohiro@jp.fujitsu.com, linux-kernel@vger.kernel.org > Date: Tuesday, December 2, 2008, 7:40 PM > > 1, I have a question related page frame reclaim . > > As i understood , under low memory pressure page frame > reclaiming will > > swap Least Recently Used cache to disk . > > So my question is assume no swap space ,how to works ? > > Whether the Least Recently Used slab cache , inode > cache etc will > > be discard since no swap space . > > Yes, page cache and slab cache (include inode cache and > dentry cache) can be dropped > although no swap. > > > > 2. BTW ,I have already used my gmail account subscribe > the linux kernel mail list .but can not post the question to > mail list , i used plain text format . > > why ? I have seen many people use account of gmail to > post question . > > I don't know. > I can post by gmail. > > But, One caution. > gmail web interface is a bit silly. it can't post patch > because > it trim tab and space.
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