On Sun, Feb 06, 2011 at 05:41:08PM +0200, Ahmed S. Darwish wrote: > (Also applicable over 2.6.38-rc3) > > Had to explore two C code files to make sense of the 'crashkernel=' > kernel parameter values. Improve the situation. > > Signed-off-by: Ahmed S. Darwish <darwish.07 at gmail.com> > --- > > diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt > index 89835a4..8f26b42 100644 > --- a/Documentation/kernel-parameters.txt > +++ b/Documentation/kernel-parameters.txt > @@ -545,9 +545,12 @@ and is between 256 and 4096 characters. It is defined in the file > Format: > <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>] > > - crashkernel=nn[KMG]@ss[KMG] > - [KNL] Reserve a chunk of physical memory to > - hold a kernel to switch to with kexec on panic. > + crashkernel=size[KMG][@offset[KMG]] > + [KNL] Using kexec, Linux can switch to a 'crash kernel' > + upon panic. This parameter reserves the physical > + memory region [offset, offset + size] for that kernel > + image. If the '@offset' part was ignored, Linux finds > + a suitable crash image start address automatically. I think this would be further improved as: ... If '@offset' is omitted then a suitable offset is selected automatically. > > crashkernel=range1:size1[,range2:size2,...][@offset] > [KNL] Same as above, but depends on the memory > > regards, > > -- > Darwish > http://darwish.07.googlepages.com > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo at vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
