On Mon, 24 Apr 2006 10:45:59 +0400 Kirill Korotaev <[EMAIL PROTECTED]> wrote:
> >>>>Yes, it is effective, and the reclamation is O(1) too. It has couple of > >>>>problems by design, (1) doesn't handle shared pages and (2) doesn't > >>>>provide support for both min_shares and max_shares. > >>> > >>>Right. I wanted to show proof-of-cencept of the pzone based controller > >>>and implemented minimal features necessary as the memory controller. > >>>So, the pzone based controller still needs development and some cleanup. > >> > >>Just out of curiosity, how it was meassured that it is effective? > > > > I don't have any benchmark numbers yet, so I can't explain the > > effectiveness with numbers. I've been looking for the way to > > measure the cost of pzones correctly, but I've not found it out yet. > > > >>How does it work when there is a global memory shortage in the system? > > > > I guess you are referring to the situation that global memory is running > > out but there are free pages in pzones. These free pages in pzones are > > handled as reserved for pzone users and not used even in global memory > > shortage. > ok. Let me explain what I mean. > Imagine the situation with global memory shortage. In kernel, there are > threads which do some job behalf the user, e.g. kjournald, loop etc. If > the user has some pzone memory, but these threads fail to do their job > some nasty things can happen (ext3 problems, deadlocks, OOM etc.) > If such behaviour is ok for you, then great. But did you consider it? > > Also, I can't understand how it works with OOM killer. If pzones has > enough memory, but there is a global shortage, who will be killed? I understand. IMHO, only the system processes should use global memory. User processes that may cause such memory shortage should be enclosed in pzones first. Thanks, -- KUROSAWA, Takahiro ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ ckrm-tech mailing list https://lists.sourceforge.net/lists/listinfo/ckrm-tech
