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Robert Richter d0c847f4bc x86/numa: Fix SRAT lookup of CFMWS ranges with numa_fill_memblks() 
[ Upstream commit f9f67e5adc ]

For configurations that have the kconfig option NUMA_KEEP_MEMINFO
disabled, numa_fill_memblks() only returns with NUMA_NO_MEMBLK (-1).
SRAT lookup fails then because an existing SRAT memory range cannot be
found for a CFMWS address range. This causes the addition of a
duplicate numa_memblk with a different node id and a subsequent page
fault and kernel crash during boot.

Fix this by making numa_fill_memblks() always available regardless of
NUMA_KEEP_MEMINFO.

As Dan suggested, the fix is implemented to remove numa_fill_memblks()
from sparsemem.h and alos using __weak for the function.

Note that the issue was initially introduced with [1]. But since
phys_to_target_node() was originally used that returned the valid node
0, an additional numa_memblk was not added. Though, the node id was
wrong too, a message is seen then in the logs:

 kernel/numa.c:  pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n",

[1] commit fd49f99c18 ("ACPI: NUMA: Add a node and memblk for each
    CFMWS not in SRAT")

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/all/66271b0072317_69102944c@dwillia2-xfh.jf.intel.com.notmuch/
Fixes: 8f10046799 ("ACPI/NUMA: Apply SRAT proximity domain to entire CFMWS window")
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Robert Richter <rrichter@amd.com>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-05-30 09:49:22 +02:00
arch x86/numa: Fix SRAT lookup of CFMWS ranges with numa_fill_memblks() 2024-05-30 09:49:22 +02:00
block block: support to account io_ticks precisely 2024-05-30 09:49:03 +02:00
certs This update includes the following changes: 2023-11-02 16:15:30 -10:00
crypto KEYS: asymmetric: Add missing dependencies of FIPS_SIGNATURE_SELFTEST 2024-05-30 09:48:45 +02:00
Documentation dt-bindings: thermal: loongson,ls2k-thermal: Fix incorrect compatible definition 2024-05-30 09:49:14 +02:00
drivers x86/numa: Fix SRAT lookup of CFMWS ranges with numa_fill_memblks() 2024-05-30 09:49:22 +02:00
fs gfs2: do_xmote fixes 2024-05-30 09:49:14 +02:00
include x86/numa: Fix SRAT lookup of CFMWS ranges with numa_fill_memblks() 2024-05-30 09:49:22 +02:00
init rust: make mutually exclusive with CFI_CLANG 2024-05-02 16:35:25 +02:00
io_uring io_uring/net: fix sendzc lazy wake polling 2024-05-30 09:49:02 +02:00
ipc shm: Slim down dependencies 2023-12-20 19:26:31 -05:00
kernel bpf: Add BPF_PROG_TYPE_CGROUP_SKB attach type enforcement in BPF_LINK_CREATE 2024-05-30 09:49:19 +02:00
lib kunit: bail out early in __kunit_test_suites_init() if there are no suites to test 2024-05-30 09:49:21 +02:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm/userfaultfd: Do not place zeropages when zeropages are disallowed 2024-05-30 09:49:00 +02:00
net wifi: nl80211: Avoid address calculations via out of bounds array indexing 2024-05-30 09:49:20 +02:00
rust rust: macros: fix soundness issue in module! macro 2024-05-17 12:14:22 +02:00
samples work around gcc bugs with 'asm goto' with outputs 2024-02-09 15:57:48 -08:00
scripts kbuild: Disable KCSAN for autogenerated *.mod.c intermediaries 2024-05-17 12:14:39 +02:00
security KEYS: trusted: Do not use WARN when encode fails 2024-05-25 16:28:40 +02:00
sound ALSA: hda: intel-dsp-config: harden I2C/I2S codec detection 2024-05-30 09:48:53 +02:00
tools selftests/bpf: Fix pointer arithmetic in test_xdp_do_redirect 2024-05-30 09:49:22 +02:00
usr Kbuild updates for v6.8 2024-01-18 17:57:07 -08:00
virt KVM: Always flush async #PF workqueue when vCPU is being destroyed 2024-04-03 15:32:03 +02:00
.clang-format clang-format: Update with v6.7-rc4's for_each macro list 2023-12-08 23:54:38 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig Add .editorconfig file for basic formatting 2023-12-28 16:22:47 +09:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Add .editorconfig file for basic formatting 2023-12-28 16:22:47 +09:00
.mailmap drm fixes for 6.8 final 2024-03-08 12:44:56 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: supplement of zswap maintainers update 2024-01-25 23:52:21 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS drm fixes for 6.8 final 2024-03-08 12:44:56 -08:00
Makefile Linux 6.8.11 2024-05-25 16:28:41 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.