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Srikar Dronamraju 10f78fd0da powerpc/numa: Fix a regression on memoryless node 0 Commit `e75130f20b` ("powerpc/numa: Offline memoryless cpuless node 0") offlines node 0 and expects nodes to be subsequently onlined when CPUs or nodes are detected. Commit `6398eaa268` ("powerpc/numa: Prefer node id queried from vphn") skips onlining node 0 when CPUs are associated with node 0. On systems with node 0 having CPUs but no memory, this causes node 0 be marked offline. This causes issues at boot time when trying to set memory node for online CPUs while building the zonelist. 0:mon> t [link register ] c000000000400354 __build_all_zonelists+0x164/0x280 [c00000000161bda0] c0000000016533c8 node_states+0x20/0xa0 (unreliable) [c00000000161bdc0] c000000000400384 __build_all_zonelists+0x194/0x280 [c00000000161be30] c000000001041800 build_all_zonelists_init+0x4c/0x118 [c00000000161be80] c0000000004020d0 build_all_zonelists+0x190/0x1b0 [c00000000161bef0] c000000001003cf8 start_kernel+0x18c/0x6a8 [c00000000161bf90] c00000000000adb4 start_here_common+0x1c/0x3e8 0:mon> r R00 = c000000000400354 R16 = 000000000b57a0e8 R01 = c00000000161bda0 R17 = 000000000b57a6b0 R02 = c00000000161ce00 R18 = 000000000b5afee8 R03 = 0000000000000000 R19 = 000000000b6448a0 R04 = 0000000000000000 R20 = fffffffffffffffd R05 = 0000000000000000 R21 = 0000000001400000 R06 = 0000000000000000 R22 = 000000001ec00000 R07 = 0000000000000001 R23 = c000000001175580 R08 = 0000000000000000 R24 = c000000001651ed8 R09 = c0000000017e84d8 R25 = c000000001652480 R10 = 0000000000000000 R26 = c000000001175584 R11 = c000000c7fac0d10 R27 = c0000000019568d0 R12 = c000000000400180 R28 = 0000000000000000 R13 = c000000002200000 R29 = c00000000164dd78 R14 = 000000000b579f78 R30 = 0000000000000000 R15 = 000000000b57a2b8 R31 = c000000001175584 pc = c000000000400194 local_memory_node+0x24/0x80 cfar= c000000000074334 mcount+0xc/0x10 lr = c000000000400354 __build_all_zonelists+0x164/0x280 msr = 8000000002001033 cr = 44002284 ctr = c000000000400180 xer = 0000000000000001 trap = 380 dar = 0000000000001388 dsisr = c00000000161bc90 0:mon> Fix this by setting node to be online while onlining CPUs that belong to node 0. Fixes: `e75130f20b` ("powerpc/numa: Offline memoryless cpuless node 0") Fixes: `6398eaa268` ("powerpc/numa: Prefer node id queried from vphn") Reported-by: Milan Mohanty <milmohan@in.ibm.com> Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20201127053738.10085-1-srikar@linux.vnet.ibm.com		2020-11-27 22:06:21 +11:00
arch	powerpc/numa: Fix a regression on memoryless node 0	2020-11-27 22:06:21 +11:00
block	blk-mq: mark flush request as IDLE in flush_end_io()	2020-10-30 08:33:49 -06:00
certs
crypto
Documentation	powerpc/64s: flush L1D after user accesses	2020-11-19 23:47:18 +11:00
drivers	Char/Misc fixes/removals for 5.10-rc2	2020-11-01 10:05:16 -08:00
fs	Driver core / Documentation fixes for 5.10-rc2	2020-11-01 09:59:13 -08:00
include	A few fixes for timers/timekeeping:	2020-11-01 11:13:45 -08:00
init
ipc
kernel	kernel/cpu: add arch override for clear_tasks_mm_cpumask() mm handling	2020-11-27 00:10:39 +11:00
lib	Driver core / Documentation fixes for 5.10-rc2	2020-11-01 09:59:13 -08:00
LICENSES
mm	mm/process_vm_access: Add missing #include <linux/compat.h>	2020-10-27 12:41:29 -07:00
net	flexible-array member conversion patches for 5.10-rc2	2020-10-31 14:31:28 -07:00
samples	misc: mic: remove the MIC drivers	2020-10-28 19:12:03 +01:00
scripts	scripts: get_abi.pl: assume ReST format by default	2020-10-30 13:16:03 +01:00
security	ima: Replace zero-length array with flexible-array member	2020-10-29 17:22:59 -05:00
sound	ARM: SoC platform updates	2020-10-24 10:33:08 -07:00
tools	selftests/powerpc: refactor entry and rfi_flush tests	2020-11-19 23:47:23 +11:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS	MAINTAINERS: Move Sangbeom Kim to credits	2020-10-26 10:11:18 +01:00
Kbuild
Kconfig
MAINTAINERS	Char/Misc fixes/removals for 5.10-rc2	2020-11-01 10:05:16 -08:00
Makefile	Linux 5.10-rc2	2020-11-01 14:43:51 -08:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

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.