Hi all, I am new to Xen. I want to debug xen. So I have few questions here. If anybody can help me, I''d appreciate it. 1: My system is ubuntu 8.04. I download the xen-3.4.2 source code from xen website. After I "make world", it will download the linux-2.6.18-xen.hg (kernel?). Also it will make many other folders (./dist). I found blkfront.c in both ./linux-2.6.18-xen.hg/drivers/xen/blkfront folder and ./dist/install/lib/modules/2.6.18.8-xen/source/drivers/xen/blkfront/ folder. So, what''s the difference of the two folders and what are they doing? 2: if I want to log the activities (read/write block) information in domU(winxp), how do I log it? For example, if domU read a block, I therefore print a information into a log file (like "domU read"). Should I change something in blkfront.c file? If so, which one should I change, because there are two blkfront.c. 3: if I want to log the information, I GUESS (not sure) I should use log.debug (or else) to log the info. into some log files. How should I do? Can anyone give me suggestion? Thanks!! John Huang _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On Tue, Feb 01, 2011 at 03:41:02AM +0800, holmes wrote:> Hi all, > I am new to Xen. I want to debug xen. So I have few questions here. If > anybody can help me, I''d appreciate it. > 1: My system is ubuntu 8.04. I download the xen-3.4.2 source code from xen > website. After I "make world", it will download the linux-2.6.18-xen.hg > (kernel?). Also it will make many other folders (./dist). I found > blkfront.c in both ./linux-2.6.18-xen.hg/drivers/xen/blkfront folder and > ./dist/install/lib/modules/2.6.18.8-xen/source/drivers/xen/blkfront/ > folder. So, what''s the difference of the two folders and what are they > doing?dist/ is the directory where stuff lands after successful build, ie. you can copy from dist/ to / to install xen.> 2: if I want to log the activities (read/write block) information in > domU(winxp), how do I log it? For example, if domU read a block, I > therefore print a information into a log file (like "domU read"). Should I > change something in blkfront.c file? If so, which one should I change, > because there are two blkfront.c. > 3: if I want to log the information, I GUESS (not sure) I should use > log.debug (or else) to log the info. into some log files. How should I do? > Can anyone give me suggestion? >blkfront is the *frontend* driver for Linux, so a Linux domU running 2.6.18-xen would use it to access the virtual disks. You need to check blkback (blkbk) driver! That''s the one running in dom0 providing virtual disks for vms. -- Pasi _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Hi Pasi, Thank you! Can you tell me how to log the activities here? Give me few codes or hints? BTW, can I use printf or what else to do the log thing? Thanks! At 2011-01-31 15:18:58，"Pasi Kärkkäinen" <pasik@iki.fi> wrote:>On Tue, Feb 01, 2011 at 03:41:02AM +0800, holmes wrote: >> Hi all, >> I am new to Xen. I want to debug xen. So I have few questions here. If >> anybody can help me, I''d appreciate it. >> 1: My system is ubuntu 8.04. I download the xen-3.4.2 source code from xen >> website. After I "make world", it will download the linux-2.6.18-xen.hg >> (kernel?). Also it will make many other folders (./dist). I found >> blkfront.c in both ./linux-2.6.18-xen.hg/drivers/xen/blkfront folder and >> ./dist/install/lib/modules/2.6.18.8-xen/source/drivers/xen/blkfront/ >> folder. So, what''s the difference of the two folders and what are they >> doing? > > >dist/ is the directory where stuff lands after successful build, >ie. you can copy from dist/ to / to install xen. > > >> 2: if I want to log the activities (read/write block) information in >> domU(winxp), how do I log it? For example, if domU read a block, I >> therefore print a information into a log file (like "domU read"). Should I >> change something in blkfront.c file? If so, which one should I change, >> because there are two blkfront.c. >> 3: if I want to log the information, I GUESS (not sure) I should use >> log.debug (or else) to log the info. into some log files. How should I do? >> Can anyone give me suggestion? >> > >blkfront is the *frontend* driver for Linux, so a Linux domU running 2.6.18-xen >would use it to access the virtual disks. > >You need to check blkback (blkbk) driver! That''s the one running in dom0 >providing virtual disks for vms. > >-- Pasi >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Hi, I think you can use xentrace or xenmon. Google them. Following is one link about them: http://jianggmulab.blogspot.com/2009/03/xentrace-xenmon.html Regards, Jiang On Mon, Jan 31, 2011 at 3:39 PM, holmes <albert.holmes@163.com> wrote:> Hi Pasi, > > Thank you! Can you tell me how to log the activities here? Give me few codes or hints? > BTW, can I use printf or what else to do the log thing? > Thanks! > At 2011-01-31 15:18:58，"Pasi Kärkkäinen" <pasik@iki.fi> wrote: >>On Tue, Feb 01, 2011 at 03:41:02AM +0800, holmes wrote: >>> Hi all, >>> I am new to Xen. I want to debug xen. So I have few questions here. If >>> anybody can help me, I''d appreciate it. >>> 1: My system is ubuntu 8.04. I download the xen-3.4.2 source code from xen >>> website. After I "make world", it will download the linux-2.6.18-xen.hg >>> (kernel?). Also it will make many other folders (./dist). I found >>> blkfront.c in both ./linux-2.6.18-xen.hg/drivers/xen/blkfront folder and >>> ./dist/install/lib/modules/2.6.18.8-xen/source/drivers/xen/blkfront/ >>> folder. So, what''s the difference of the two folders and what are they >>> doing? >> >> >>dist/ is the directory where stuff lands after successful build, >>ie. you can copy from dist/ to / to install xen. >> >> >>> 2: if I want to log the activities (read/write block) information in >>> domU(winxp), how do I log it? For example, if domU read a block, I >>> therefore print a information into a log file (like "domU read"). Should I >>> change something in blkfront.c file? If so, which one should I change, >>> because there are two blkfront.c. >>> 3: if I want to log the information, I GUESS (not sure) I should use >>> log.debug (or else) to log the info. into some log files. How should I do? >>> Can anyone give me suggestion? >>> >> >>blkfront is the *frontend* driver for Linux, so a Linux domU running 2.6.18-xen >>would use it to access the virtual disks. >> >>You need to check blkback (blkbk) driver! That''s the one running in dom0 >>providing virtual disks for vms. >> >>-- Pasi >> > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel