forked from Minki/linux
mainlining shenanigans
a77af552cc
fadump sets up crash memory ranges to be used for creating PT_LOAD program headers in elfcore header. Memory chunk RMA_START through boot memory area size is added as the first memory range because firmware, at the time of crash, moves this memory chunk to different location specified during fadump registration making it necessary to create a separate program header for it with the correct offset. This memory chunk is skipped while setting up the remaining memory ranges. But currently, there is possibility that some of this memory may have duplicate entries like when it is hot-removed and added again. Ensure that no two memory ranges represent the same memory. When 5 lmbs are hot-removed and then hot-plugged before registering fadump, here is how the program headers in /proc/vmcore exported by fadump look like without this change: Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flags Align NOTE 0x0000000000010000 0x0000000000000000 0x0000000000000000 0x0000000000001894 0x0000000000001894 0 LOAD 0x0000000000021020 0xc000000000000000 0x0000000000000000 0x0000000040000000 0x0000000040000000 RWE 0 LOAD 0x0000000040031020 0xc000000000000000 0x0000000000000000 0x0000000010000000 0x0000000010000000 RWE 0 LOAD 0x0000000050040000 0xc000000010000000 0x0000000010000000 0x0000000050000000 0x0000000050000000 RWE 0 LOAD 0x00000000a0040000 0xc000000060000000 0x0000000060000000 0x000000019ffe0000 0x000000019ffe0000 RWE 0 and with this change: Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flags Align NOTE 0x0000000000010000 0x0000000000000000 0x0000000000000000 0x0000000000001894 0x0000000000001894 0 LOAD 0x0000000000021020 0xc000000000000000 0x0000000000000000 0x0000000040000000 0x0000000040000000 RWE 0 LOAD 0x0000000040030000 0xc000000040000000 0x0000000040000000 0x0000000020000000 0x0000000020000000 RWE 0 LOAD 0x0000000060030000 0xc000000060000000 0x0000000060000000 0x000000019ffe0000 0x000000019ffe0000 RWE 0 Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Reviewed-by: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.cocciconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.mailmap | ||
COPYING | ||
CREDITS | ||
Kbuild | ||
Kconfig | ||
MAINTAINERS | ||
Makefile | ||
README |
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.