On Tue, Apr 06, 2021 at 03:11:51PM +0100, Hongyan Xia wrote: > From: Hongyan Xia <hongyxia@xxxxxxxxxx> > > We have observed a couple of cases where after a successful kexec, the > crash kernel loaded in the 2nd kernel will run out of memory and > crash. We narrowed down to two issues: > > 1. when preparing the memory map, kexec excludes the Interrupt Vector > Table. However, the end address of IVT is incorrect. > 2. The wrong end address of IVT is not 1KiB aligned. When preparing the > crashkernel, the memory map will reject unaligned memory chunks. On > many x86 platforms this means the entire bottom 1MiB range is > excluded from the crashkernel memory map, resulting in OOM when the > crashkernel boots. > > Patch 1 fixes 1 which is actually enough to eliminate the issue but we > feel that such issue may happen again (e.g., with a weird BIOS that has > unaligned e820 map), so we also have patch 2 to improve the handling of > unaligned memory. > > Hongyan Xia (2): > Fix where the real mode interrupt vector ends > Shrink segments to fit alignment instead of throwing them away Thanks, series applied. _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
