Re: Can't get a Linux 3.6-rc zImage smaller than 2MB
On Tue, Sep 11, 2012 at 9:46 PM, Maciej Soltysiak wrote: > Hi, > > Was anyone successful in getting a 3.6-rc5 kernel zImage smaller than 2MB? > I'm trying to fit this onto SS4000-e and I've been failing desperately > for the last couple of days. isn't there a parameter which allows you to select the modules that go into an initrd? hmmm /etc/initramfs-tools/initramfs.conf - modules=most also it looks like you can specify COMPRESS=xz which, assuming you've enabled xz compression in the linux kernel, would give you a bit more space. also are you using busybox? again, that would likely save some space, esp. if you compiled it specially and *only* with the actual functions you need. send a link to a file online where the list of files is, in the initrd - it will help check what's going on here. but, just for a laugh please do tell me the size of the kernel you've got. i remember doing 2.4.24 kernels and they were only 600k. we converted to 2.6.8 or thereabouts and that *immediately* shot up to 900k (exactly the same config options). hilarious. not. l. -- To UNSUBSCRIBE, email to debian-arm-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/capweedwookb7hbqphn6xzfinq4mdrgrhkhmp8zyhqcvgdrs...@mail.gmail.com
Can't get a Linux 3.6-rc zImage smaller than 2MB
Hi, Was anyone successful in getting a 3.6-rc5 kernel zImage smaller than 2MB? I'm trying to fit this onto SS4000-e and I've been failing desperately for the last couple of days. Regards, Maciej -- To UNSUBSCRIBE, email to debian-arm-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/camzr1ycwsgdjasdk1tj_qvhb_e_vvt4jpchkni6kk80po0r...@mail.gmail.com
Re: disable l2 cache on kirkwood devices (workaround #658904)
On Tue, 2012-09-11 at 03:57 -0700, Jonathan Nieder wrote: > Ian Campbell wrote: > > > My main concern with doing this on the kernel side is that it will > > eventually fall foul of the attempts to reduce everything to a single > > kernel image, since the code will necessarily be quite kirkwood specific > > and run very early on. > > Is it possible to do something reasonable if the extra features > register is read first? (Please forgive my ignorance.) I'm afraid I don't know either. Is this extra features register ARM architectural or specific to the Kirkwood devices? I think the cache control registers are implementation defined, so this code would need to know it is running on a specific set of processors before it would be safe to run it. > > Martin's testing of di on ARM[0] suggests this issue isn't all that > > widespread, which lead me to conclude that the risk of making a change > > like this (either in the kernel or the installer/flash-kernel) for > > Wheezy was not worth the chance of breaking some other kirkwood device. > > I think that's ok --- the change would be valuable upstream anyway, > and it can filter into mainline and wheezy whenever it has had an > appropriate amount of testing. Ian. -- Ian Campbell Current Noise: Faal - My Body Glows Red A soft drink turneth away company. -- To UNSUBSCRIBE, email to debian-arm-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/1347370061.5305.147.ca...@zakaz.uk.xensource.com
Re: disable l2 cache on kirkwood devices (workaround #658904)
Ian Campbell wrote: > My main concern with doing this on the kernel side is that it will > eventually fall foul of the attempts to reduce everything to a single > kernel image, since the code will necessarily be quite kirkwood specific > and run very early on. Is it possible to do something reasonable if the extra features register is read first? (Please forgive my ignorance.) > Martin's testing of di on ARM[0] suggests this issue isn't all that > widespread, which lead me to conclude that the risk of making a change > like this (either in the kernel or the installer/flash-kernel) for > Wheezy was not worth the chance of breaking some other kirkwood device. I think that's ok --- the change would be valuable upstream anyway, and it can filter into mainline and wheezy whenever it has had an appropriate amount of testing. Jonathan -- To UNSUBSCRIBE, email to debian-arm-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120911105734.GA2356@mannheim-rule.local
Re: disable l2 cache on kirkwood devices (workaround #658904)
On Mon, 2012-09-10 at 23:09 -0700, Jonathan Nieder wrote: > Hi Ian, > > On Aug 30, 2012, Ian Campbell wrote: > > > I've just tried injecting the following onto the head of the zImage (in > > a similar manner to flash-kernel's set_machine_id function): > [...] > > This works around the issue on my dreamplug (this is effectively the > > same code sequence as what the u-boot fix does). > > > > I can see two ways of distributing this fix. Either a kernel patch gated > > on CONFIG_ARCH_KIRKWOOD to some early bit of code or use devio in > > flash-kernel + the installer build. > > Sorry I missed this before. That sounds like an excellent idea for a > kernel patch. A kind user on the linux-arm-kernel@ list[1] recently > mentioned he'd be willing to test patches, if you need a guinea pig, > and I assume once a patch is written and tested it should be possible > to get useful feedback from the list. My main concern with doing this on the kernel side is that it will eventually fall foul of the attempts to reduce everything to a single kernel image, since the code will necessarily be quite kirkwood specific and run very early on. Martin's testing of di on ARM[0] suggests this issue isn't all that widespread, which lead me to conclude that the risk of making a change like this (either in the kernel or the installer/flash-kernel) for Wheezy was not worth the chance of breaking some other kirkwood device. Ian. [0] https://lists.debian.org/debian-boot/2012/09/msg00052.html -- Ian Campbell Current Noise: Crowbar - To Build A Mountain Sex is like air. It's only a big deal if you can't get any. -- To UNSUBSCRIBE, email to debian-arm-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/1347355043.5305.137.ca...@zakaz.uk.xensource.com
