On 03/25/2013 06:56 PM, zhouzhouyi@xxxxxxxxx wrote: > From: root <root@zzy-Lenovo.(none)> > > > On Documentation/kdump/kdump.txt, section Boot into System Kernel: On x86 and x86_64, use > "crashkernel=64M@16M", but some OSes like ubuntu 12.10 use ram fs larger than 64M, so in these cases the > memory reserved for crashkernel should be at least 128M. People use different initramfs generators for different purpose. That means the size of initramfs and also its memory consuming can vary very much from each other. You just can't list all these generators and their recommended reserved memory here. Though I have to say crashkernel=128M is good choice. I think it would be better to leave this to user or distribution itself to determine how much memory should be reserved for crash kernel, then export this value to kernel in some ways. Thanks, WANG Chao > > > Signed-off-by: Zhouyi Zhou <yizhouzhou@xxxxxxxxx> > --- > Documentation/kdump/kdump.txt | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt > index 13f1aa0..1e850e0 100644 > --- a/Documentation/kdump/kdump.txt > +++ b/Documentation/kdump/kdump.txt > @@ -290,7 +290,9 @@ Boot into System Kernel > "crashkernel=64M@16M" tells the system kernel to reserve 64 MB of memory > starting at physical address 0x01000000 (16MB) for the dump-capture kernel. > > - On x86 and x86_64, use "crashkernel=64M@16M". > + On x86 and x86_64, use "crashkernel=64M@16M" (some OSes use init ram fs larger > +than 64M, for example ubuntu-12.10, use crashkernel=128M@16M instead, or dump-capture > +kernel will out of memory). > > On ppc64, use "crashkernel=128M@32M". > > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
