Thanks for reviewing Is it sounds good to add following line into section "Boot into System Kernel": The memory reserved for crash kernel should be no less than the unpacked init ram disk size that loaded with dump-capture kernel plus wired memory used by kernel itself. ################# After all, I have been trapped into "hang after capture" problem when sticking strictly to this document. Cheers Zhouyi > > 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
