* Re: KSM not working on 2.6.28.7 and qemu-kvm 0.12.2 ? [not found] <4B81A70A.1010407@gilouweb.com> @ 2010-02-22 5:40 ` Nikola Ciprich 2010-02-22 21:02 ` Gilles PIETRI 0 siblings, 1 reply; 3+ messages in thread From: Nikola Ciprich @ 2010-02-22 5:40 UTC (permalink / raw) To: Gilles PIETRI; +Cc: kvm, nikola.ciprich Hi Gilles, maybe You have the same problem I experienced? see http://www.mail-archive.com/kvm@vger.kernel.org/msg28572.html nik On Sun, Feb 21, 2010 at 10:35:06PM +0100, Gilles PIETRI wrote: > Hi, > > I'm running a 2.6.32.7 kernel with KSM enabled (CONFIG_KSM=y), with > qemu-kvm 0.12.2 that has support for KSM (exec.c checks for > MADV_MERGEABLE).. > > So I have KSM running, /sys/kernel/mm/ksm/run is at 1, and after a > few hours running a dozen of VMs, many of them running the same > OS/base image, I see no page being shared, KSM seems inactive. > > Values are pretty much to their default value, and it seems KSM is > simply not working.. I see ksmd in the process list though, but here > are the sysfs values reported: > ==> /sys/kernel/mm/ksm/full_scans <== > 0 > > ==> /sys/kernel/mm/ksm/max_kernel_pages <== > 1027257 > > ==> /sys/kernel/mm/ksm/pages_shared <== > 0 > > ==> /sys/kernel/mm/ksm/pages_sharing <== > 0 > > ==> /sys/kernel/mm/ksm/pages_to_scan <== > 100 > > ==> /sys/kernel/mm/ksm/pages_unshared <== > 0 > > ==> /sys/kernel/mm/ksm/pages_volatile <== > 0 > > ==> /sys/kernel/mm/ksm/run <== > 1 > > ==> /sys/kernel/mm/ksm/sleep_millisecs <== > 20 > > Any clues? > > Cheers, > Gilou > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28. rijna 168, 709 01 Ostrava tel.: +420 596 603 142 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: servis@linuxbox.cz ------------------------------------- ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: KSM not working on 2.6.28.7 and qemu-kvm 0.12.2 ? 2010-02-22 5:40 ` KSM not working on 2.6.28.7 and qemu-kvm 0.12.2 ? Nikola Ciprich @ 2010-02-22 21:02 ` Gilles PIETRI 2010-02-23 18:21 ` Gilles PIETRI 0 siblings, 1 reply; 3+ messages in thread From: Gilles PIETRI @ 2010-02-22 21:02 UTC (permalink / raw) To: Nikola Ciprich; +Cc: kvm Le 22/02/2010 06:40, Nikola Ciprich a écrit : > Hi Gilles, maybe You have the same problem I experienced? > see http://www.mail-archive.com/kvm@vger.kernel.org/msg28572.html > nik > Hi, The linux headers do include the MADV_MERGEABLE settings, and the libc is the debian one which happened to work fine earlier in this regard. Anyway I still added the flags just to make sure, and nothing more happens. Cheers, Gilou > On Sun, Feb 21, 2010 at 10:35:06PM +0100, Gilles PIETRI wrote: >> Hi, >> >> I'm running a 2.6.32.7 kernel with KSM enabled (CONFIG_KSM=y), with >> qemu-kvm 0.12.2 that has support for KSM (exec.c checks for >> MADV_MERGEABLE).. >> >> So I have KSM running, /sys/kernel/mm/ksm/run is at 1, and after a >> few hours running a dozen of VMs, many of them running the same >> OS/base image, I see no page being shared, KSM seems inactive. >> >> Values are pretty much to their default value, and it seems KSM is >> simply not working.. I see ksmd in the process list though, but here >> are the sysfs values reported: >> ==> /sys/kernel/mm/ksm/full_scans <== >> 0 >> >> ==> /sys/kernel/mm/ksm/max_kernel_pages <== >> 1027257 >> >> ==> /sys/kernel/mm/ksm/pages_shared <== >> 0 >> >> ==> /sys/kernel/mm/ksm/pages_sharing <== >> 0 >> >> ==> /sys/kernel/mm/ksm/pages_to_scan <== >> 100 >> >> ==> /sys/kernel/mm/ksm/pages_unshared <== >> 0 >> >> ==> /sys/kernel/mm/ksm/pages_volatile <== >> 0 >> >> ==> /sys/kernel/mm/ksm/run <== >> 1 >> >> ==> /sys/kernel/mm/ksm/sleep_millisecs <== >> 20 >> >> Any clues? >> >> Cheers, >> Gilou >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> > ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: KSM not working on 2.6.28.7 and qemu-kvm 0.12.2 ? 2010-02-22 21:02 ` Gilles PIETRI @ 2010-02-23 18:21 ` Gilles PIETRI 0 siblings, 0 replies; 3+ messages in thread From: Gilles PIETRI @ 2010-02-23 18:21 UTC (permalink / raw) To: Nikola Ciprich; +Cc: kvm Le 22/02/2010 22:02, Gilles PIETRI a écrit : > Le 22/02/2010 06:40, Nikola Ciprich a écrit : >> Hi Gilles, maybe You have the same problem I experienced? >> see http://www.mail-archive.com/kvm@vger.kernel.org/msg28572.html >> nik >> > > Hi, > > The linux headers do include the MADV_MERGEABLE settings, and the libc > is the debian one which happened to work fine earlier in this regard. > Anyway I still added the flags just to make sure, and nothing more happens. > > Cheers, > > Gilou OK, I had a doubt, so I did it again, and made sure there wasn't a chance for the MADV_* to be missing... And it was the issue actually.. Not sure what happened there, given the linux headers are here.. It works fine finally, thanks Nikola for your pointer. Regards, Gilou > >> On Sun, Feb 21, 2010 at 10:35:06PM +0100, Gilles PIETRI wrote: >>> Hi, >>> >>> I'm running a 2.6.32.7 kernel with KSM enabled (CONFIG_KSM=y), with >>> qemu-kvm 0.12.2 that has support for KSM (exec.c checks for >>> MADV_MERGEABLE).. >>> >>> So I have KSM running, /sys/kernel/mm/ksm/run is at 1, and after a >>> few hours running a dozen of VMs, many of them running the same >>> OS/base image, I see no page being shared, KSM seems inactive. >>> >>> Values are pretty much to their default value, and it seems KSM is >>> simply not working.. I see ksmd in the process list though, but here >>> are the sysfs values reported: >>> ==> /sys/kernel/mm/ksm/full_scans <== >>> 0 >>> >>> ==> /sys/kernel/mm/ksm/max_kernel_pages <== >>> 1027257 >>> >>> ==> /sys/kernel/mm/ksm/pages_shared <== >>> 0 >>> >>> ==> /sys/kernel/mm/ksm/pages_sharing <== >>> 0 >>> >>> ==> /sys/kernel/mm/ksm/pages_to_scan <== >>> 100 >>> >>> ==> /sys/kernel/mm/ksm/pages_unshared <== >>> 0 >>> >>> ==> /sys/kernel/mm/ksm/pages_volatile <== >>> 0 >>> >>> ==> /sys/kernel/mm/ksm/run <== >>> 1 >>> >>> ==> /sys/kernel/mm/ksm/sleep_millisecs <== >>> 20 >>> >>> Any clues? >>> >>> Cheers, >>> Gilou >>> -- >>> To unsubscribe from this list: send the line "unsubscribe kvm" in >>> the body of a message to majordomo@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> > > ^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-02-22 5:40 ` KSM not working on 2.6.28.7 and qemu-kvm 0.12.2 ? Nikola Ciprich
2010-02-22 21:02 ` Gilles PIETRI
2010-02-23 18:21 ` Gilles PIETRI
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