Cant you, modify bootmem allocator to test with memtest patterns and then use kexec (as Pavel suggested) to test the one where kernel was sitting earlier?
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Pavel Machek Sent: Friday, December 21, 2007 6:28 PM To: Matthew Bloch Cc: linux-kernel@vger.kernel.org Subject: Re: Testing RAM from userspace / question about memmap= arguments On Tue 2007-12-18 17:06:24, Matthew Bloch wrote: > Hi - I'm trying to come up with a way of thoroughly testing every byte > of RAM from within Linux on amd64 (so that it can be automated better > than using memtest86+), and came up with an idea which I'm not sure is > supported or practical. > > The obvious problem with testing memory from user space is that you > can't mlock all of it, so the best you can do is about three quarters, > and hope that the rest of the memory is okay. > > In order to test all of the memory, I'd like to run the user-space > memtester over two boots of the kernel. > > Say we have a 1024MB machine, the first boot I'd not specify any > arguments and assume the kernel would start at the bottom of physical > memory and work its way up, so that the kernel & working userspace would > live at the bottom, and the rest would be testable from space. > > On the second boot, could I then specify: > > memmap=exact [EMAIL PROTECTED] [EMAIL PROTECTED] Actually, with kexec, you can probably doing without reboot. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
