Messages in this thread | | | Date | Wed, 2 Nov 2022 19:49:31 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH v13 7/7] x86/crash: add x86 crash hotplug support |
| |
On Wed, Nov 02, 2022 at 11:54:08AM -0500, Eric DeVolder wrote: > Technically the answer is no; cpu hotplug events are independent of memory > hotplug events, but both are written into the elfcorehdr, so in reality > yes... The elfcorehdr contains a single list of Phdrs describing CPUs and > crash memory ranges; the entire list is re-written on a hotplug change.
Then technically also yes. Otherwise your crash information will contain wrong CPU numbers.
How has that not been a problem until now...?
I.e., offline a bunch of CPUs and then cause a crash dump.
Hmm.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
| |