* XL low memory @ 2013-05-29 5:22 Dominic Russell 2013-05-29 13:00 ` Ben Guthro 0 siblings, 1 reply; 4+ messages in thread From: Dominic Russell @ 2013-05-29 5:22 UTC (permalink / raw) To: xen-devel [-- Attachment #1.1: Type: text/plain, Size: 575 bytes --] Hello, With xl toolstack, is it possible to declare a low memory parameters, like we could with xend in the xend-config.sxp file, with the (dom0-min-mem) parameter? I did try to google this, but could only find information about the xend-config file, which xl does not read. I have a Dell server, on which I tested that the minimum it can go before crashing the kernel is 224mb, but the current minimum set in libxl_internal.h is only 128mb! By the mean time, I changed the constant and recompiled 4.2.2. To have a parameter would be easier :). Thanks, Dominic [-- Attachment #1.2: Type: text/html, Size: 999 bytes --] [-- Attachment #2: Type: text/plain, Size: 126 bytes --] _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: XL low memory 2013-05-29 5:22 XL low memory Dominic Russell @ 2013-05-29 13:00 ` Ben Guthro 2013-05-29 13:58 ` Dominic Russell 0 siblings, 1 reply; 4+ messages in thread From: Ben Guthro @ 2013-05-29 13:00 UTC (permalink / raw) To: Dominic Russell; +Cc: xen-devel On Wed, May 29, 2013 at 1:22 AM, Dominic Russell <GTA_doum@hotmail.com> wrote: > Hello, > > With xl toolstack, is it possible to declare a low memory parameters, like > we could with xend in the xend-config.sxp file, with the (dom0-min-mem) > parameter? > > I did try to google this, but could only find information about the > xend-config file, which xl does not read. > I have a Dell server, on which I tested that the minimum it can go before > crashing the kernel is 224mb, but the current minimum set in > libxl_internal.h is only 128mb! By the mean time, I changed the constant > and recompiled 4.2.2. To have a parameter would be easier :). Hi, You can do this with Xen command line parameters, at boot time. See the first section of the following wiki page for reference: http://wiki.xen.org/wiki/Xen_Best_Practices Ben ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: XL low memory 2013-05-29 13:00 ` Ben Guthro @ 2013-05-29 13:58 ` Dominic Russell 2013-05-29 14:02 ` Ben Guthro 0 siblings, 1 reply; 4+ messages in thread From: Dominic Russell @ 2013-05-29 13:58 UTC (permalink / raw) To: Ben Guthro; +Cc: xen-devel [-- Attachment #1.1: Type: text/plain, Size: 1326 bytes --] Hello, My understanding of this parameter, is that it sets the starting amount of memory, and the maximum authorized. The memory could be ballooned down anyway! Is that the case? I want to keep the balloon feature for now, because there is only two gigs of RAM on this computer... Thanks, Dominic From: Ben Guthro Sent: Wednesday, May 29, 2013 9:00 AM To: Dominic Russell Cc: xen-devel@lists.xensource.com Subject: Re: [Xen-devel] XL low memory On Wed, May 29, 2013 at 1:22 AM, Dominic Russell <GTA_doum@hotmail.com> wrote: > Hello, > > With xl toolstack, is it possible to declare a low memory parameters, like > we could with xend in the xend-config.sxp file, with the (dom0-min-mem) > parameter? > > I did try to google this, but could only find information about the > xend-config file, which xl does not read. > I have a Dell server, on which I tested that the minimum it can go before > crashing the kernel is 224mb, but the current minimum set in > libxl_internal.h is only 128mb! By the mean time, I changed the constant > and recompiled 4.2.2. To have a parameter would be easier :). Hi, You can do this with Xen command line parameters, at boot time. See the first section of the following wiki page for reference: http://wiki.xen.org/wiki/Xen_Best_Practices Ben [-- Attachment #1.2: Type: text/html, Size: 2554 bytes --] [-- Attachment #2: Type: text/plain, Size: 126 bytes --] _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: XL low memory 2013-05-29 13:58 ` Dominic Russell @ 2013-05-29 14:02 ` Ben Guthro 0 siblings, 0 replies; 4+ messages in thread From: Ben Guthro @ 2013-05-29 14:02 UTC (permalink / raw) To: Dominic Russell; +Cc: xen-devel See the comments in domain_build.c above parse_dom0_mem for details: http://tinyurl.com/pdtjje9 /* * dom0_mem=[min:<min_amt>,][max:<max_amt>,][<amt>] * * <min_amt>: The minimum amount of memory which should be allocated for dom0. * <max_amt>: The maximum amount of memory which should be allocated for dom0. * <amt>: The precise amount of memory to allocate for dom0. * * Notes: * 1. <amt> is clamped from below by <min_amt> and from above by available * memory and <max_amt> * 2. <min_amt> is clamped from above by available memory and <max_amt> * 3. <min_amt> is ignored if it is greater than <max_amt> * 4. If <amt> is not specified, it is calculated as follows: * "All of memory is allocated to domain 0, minus 1/16th which is reserved * for uses such as DMA buffers (the reservation is clamped to 128MB)." * * Each value can be specified as positive or negative: * If +ve: The specified amount is an absolute value. * If -ve: The specified amount is subtracted from total available memory. */ min:XXX will not be ballooned lower than specified. On Wed, May 29, 2013 at 9:58 AM, Dominic Russell <GTA_doum@hotmail.com> wrote: > Hello, > > My understanding of this parameter, is that it sets the starting amount of > memory, and the maximum authorized. The memory could be ballooned down > anyway! Is that the case? > I want to keep the balloon feature for now, because there is only two gigs > of RAM on this computer... > > Thanks, > Dominic > > From: Ben Guthro > Sent: Wednesday, May 29, 2013 9:00 AM > To: Dominic Russell > Cc: xen-devel@lists.xensource.com > Subject: Re: [Xen-devel] XL low memory > > On Wed, May 29, 2013 at 1:22 AM, Dominic Russell <GTA_doum@hotmail.com> > wrote: >> Hello, >> >> With xl toolstack, is it possible to declare a low memory parameters, like >> we could with xend in the xend-config.sxp file, with the (dom0-min-mem) >> parameter? >> >> I did try to google this, but could only find information about the >> xend-config file, which xl does not read. >> I have a Dell server, on which I tested that the minimum it can go before >> crashing the kernel is 224mb, but the current minimum set in >> libxl_internal.h is only 128mb! By the mean time, I changed the constant >> and recompiled 4.2.2. To have a parameter would be easier :). > > Hi, > > You can do this with Xen command line parameters, at boot time. > See the first section of the following wiki page for reference: > > http://wiki.xen.org/wiki/Xen_Best_Practices > > Ben ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-05-29 14:02 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-05-29 5:22 XL low memory Dominic Russell 2013-05-29 13:00 ` Ben Guthro 2013-05-29 13:58 ` Dominic Russell 2013-05-29 14:02 ` Ben Guthro
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.