I''ve just discovered a couple of bytes of bad memory on one of my systems using memtest86+. now, with a plain linux installation i could use BadRAM to easily work around the issue. i assume, however, that with xen it''s not the dom0 that does physical memory allocation, but xen itself, so is there any chance of BadRAM-like functionallity being added to xen? -- Jody Belka knew (at) pimb (dot) org ------------------------------------------------------- This SF.Net email is sponsored by OSTG. Have you noticed the changes on Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, one more big change to announce. We are now OSTG- Open Source Technology Group. Come see the changes on the new OSTG site. www.ostg.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
If it''s in the lowest 64MB of memory then it would be tricky, as Xen has a fairly rigid memory map in that space during boot. Above 64MB we could add support for resreving bad memory pages so they can''t be allocated for use. -- Keir> I''ve just discovered a couple of bytes of bad memory on one of my systems > using memtest86+. now, with a plain linux installation i could use BadRAM > to easily work around the issue. i assume, however, that with xen it''s not > the dom0 that does physical memory allocation, but xen itself, so is there > any chance of BadRAM-like functionallity being added to xen? > > -- > Jody Belka > knew (at) pimb (dot) org > > > ------------------------------------------------------- > This SF.Net email is sponsored by OSTG. Have you noticed the changes on > Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, > one more big change to announce. We are now OSTG- Open Source Technology > Group. Come see the changes on the new OSTG site. www.ostg.com > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xen-devel------------------------------------------------------- This SF.Net email is sponsored by OSTG. Have you noticed the changes on Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, one more big change to announce. We are now OSTG- Open Source Technology Group. Come see the changes on the new OSTG site. www.ostg.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
On Thu, Aug 05, 2004 at 11:12:13PM +0100, Keir Fraser wrote:> > If it''s in the lowest 64MB of memory then it would be tricky, as Xen > has a fairly rigid memory map in that space during boot. Above 64MB we > could add support for resreving bad memory pages so they can''t be > allocated for use.That wouldn''t be a problem here. My bad patch is up around the 750meg point :) -- Jody Belka knew (at) pimb (dot) org ------------------------------------------------------- This SF.Net email is sponsored by OSTG. Have you noticed the changes on Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, one more big change to announce. We are now OSTG- Open Source Technology Group. Come see the changes on the new OSTG site. www.ostg.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
> On Thu, Aug 05, 2004 at 11:12:13PM +0100, Keir Fraser wrote: > > > > If it''s in the lowest 64MB of memory then it would be tricky, as Xen > > has a fairly rigid memory map in that space during boot. Above 64MB we > > could add support for resreving bad memory pages so they can''t be > > allocated for use. > > That wouldn''t be a problem here. My bad patch is up around the 750meg point :) > > > -- > Jody Belka > knew (at) pimb (dot) orgI''ll take a look. It shouldn''t be very tricky to add. -- Keir ------------------------------------------------------- This SF.Net email is sponsored by OSTG. Have you noticed the changes on Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, one more big change to announce. We are now OSTG- Open Source Technology Group. Come see the changes on the new OSTG site. www.ostg.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel
> > On Thu, Aug 05, 2004 at 11:12:13PM +0100, Keir Fraser wrote: > > > > > > If it''s in the lowest 64MB of memory then it would be tricky, as Xen > > > has a fairly rigid memory map in that space during boot. Above 64MB we > > > could add support for resreving bad memory pages so they can''t be > > > allocated for use. > > > > That wouldn''t be a problem here. My bad patch is up around the 750meg point :) > > -- > > Jody Belka > > knew (at) pimb (dot) org > > I''ll take a look. It shouldn''t be very tricky to add. > > -- KeirOkay, I checked in a command-line option for Xen: badpage=<page number>[,<page number>]* Specify a list of pages not to be allocated for use because they contain bad bytes. For example, if your memory tester says that byte 0x12345678 is bad, you would place ''badpage=0x12345'' on Xen''s command line (i.e., the last three digits of the byte address are not included!). -- Keir ------------------------------------------------------- This SF.Net email is sponsored by OSTG. Have you noticed the changes on Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, one more big change to announce. We are now OSTG- Open Source Technology Group. Come see the changes on the new OSTG site. www.ostg.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xen-devel