Changes in Kconfig

c6a8239a - virtio-mem: support CONFIG_PROC_VMCORE_DEVICE_RAM

Wed, 04 Dec 2024 12:54:42 +0000

virtio-mem: support CONFIG_PROC_VMCORE_DEVICE_RAMLet's implement the get_device_ram() vmcore callback, soarchitectures that select NEED_PROC_VMCORE_NEED_DEVICE_RAM, like s390soon, can include that memory in a crash dump.Merge ranges, and process ranges that might contain a mixture of pluggedand unplugged, to reduce the total number of ranges.Signed-off-by: David Hildenbrand Message-Id: <20241204125444.1734652-12-david@redhat.com>Signed-off-by: Michael S. Tsirkin List of files: /linux-6.15/fs/proc/Kconfig

7ad4d1f6 - fs/proc/vmcore: introduce PROC_VMCORE_DEVICE_RAM to detect device RAM ranges in 2nd kernel

Wed, 04 Dec 2024 12:54:39 +0000

fs/proc/vmcore: introduce PROC_VMCORE_DEVICE_RAM to detect device RAM ranges in 2nd kernels390 allocates+prepares the elfcore hdr in the dump (2nd) kernel, not inthe crashed kernel.RAM provided by memory devices such as virtio-mem can only be detectedusing the device driver; when vmcore_init() is called, these devicedrivers are usually not loaded yet, or the devices did not get probedyet. Consequently, on s390 these RAM ranges will not be included inthe crash dump, which makes the dump partially corrupt and isunfortunate.Instead of deferring the vmcore_init() call, to an (unclear?) later point,let's reuse the vmcore_cb infrastructure to obtain device RAM ranges asthe device drivers probe the device and get access to this information.Then, we'll add these ranges to the vmcore, adding more PT_LOADentries and updating the offsets+vmcore size.Use a separate Kconfig option to be set by an architecture to include thiscode only if the arch really needs it. Further, we'll make the configdepend on the relevant drivers (i.e., virtio_mem) once they implementsupport (next). The alternative of having a PROVIDE_PROC_VMCORE_DEVICE_RAMconfig option was dropped for now for simplicity.The current target use case is s390, which only creates an elf64elfcore, so focusing on elf64 is sufficient.Signed-off-by: David Hildenbrand Message-Id: <20241204125444.1734652-9-david@redhat.com>Acked-by: Andrew Morton Signed-off-by: Michael S. Tsirkin List of files: /linux-6.15/fs/proc/Kconfig

443cbaf9 - crash: split vmcoreinfo exporting code out from crash_core.c

Wed, 24 Jan 2024 05:12:42 +0000

crash: split vmcoreinfo exporting code out from crash_core.cNow move the relevant codes into separate files:kernel/crash_reserve.c, include/linux/crash_reserve.h.And add config item CRASH_RESERVE to control its enabling.And also update the old ifdeffery of CONFIG_CRASH_CORE, including of and config item dependency on CRASH_COREaccordingly.And also do renaming as follows: - arch/xxx/kernel/{crash_core.c => vmcore_info.c}because they are only related to vmcoreinfo exporting on x86, arm64,riscv.And also Remove config item CRASH_CORE, and rely on CONFIG_KEXEC_CORE todecide if build in crash_core.c.[yang.lee@linux.alibaba.com: remove duplicated include in vmcore_info.c] Link: https://lkml.kernel.org/r/20240126005744.16561-1-yang.lee@linux.alibaba.comLink: https://lkml.kernel.org/r/20240124051254.67105-3-bhe@redhat.comSigned-off-by: Baoquan He Signed-off-by: Yang Li Acked-by: Hari Bathini Cc: Al Viro Cc: Eric W. Biederman Cc: Pingfan Liu Cc: Klara Modin Cc: Michael Kelley Cc: Nathan Chancellor Cc: Stephen Rothwell Cc: Yang Li Signed-off-by: Andrew Morton List of files: /linux-6.15/fs/proc/Kconfig

7ec354ba - proc: make config PROC_CHILDREN depend on PROC_FS

Fri, 09 Sep 2022 12:25:29 +0000

proc: make config PROC_CHILDREN depend on PROC_FSCommit 2e13ba54a268 ("fs, proc: introduce CONFIG_PROC_CHILDREN")introduces the config PROC_CHILDREN to configure kernels to provide the/proc//task//children file.When one deselects PROC_FS for kernel builds without /proc/, the configPROC_CHILDREN has no effect anymore, but is still visible in menuconfig.Add the dependency on PROC_FS to make the PROC_CHILDREN option disappearfor kernel builds without /proc/.Link: https://lkml.kernel.org/r/20220909122529.1941-1-lukas.bulwahn@gmail.comFixes: 2e13ba54a268 ("fs, proc: introduce CONFIG_PROC_CHILDREN")Signed-off-by: Lukas Bulwahn Cc: Iago López Galeiras Cc: Alexey Dobriyan Signed-off-by: Andrew Morton List of files: /linux-6.15/fs/proc/Kconfig

a7f7f624 - treewide: replace '---help---' in Kconfig files with 'help'

Sat, 13 Jun 2020 16:50:22 +0000

treewide: replace '---help---' in Kconfig files with 'help'Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over'---help---'"), the number of '---help---' has been graduallydecreasing, but there are still more than 2400 instances.This commit finishes the conversion. While I touched the lines,I also fixed the indentation.There are a variety of indentation styles found. a) 4 spaces + '---help---' b) 7 spaces + '---help---' c) 8 spaces + '---help---' d) 1 space + 1 tab + '---help---' e) 1 tab + '---help---' (correct indentation) f) 1 tab + 1 space + '---help---' g) 1 tab + 2 spaces + '---help---'In order to convert all of them to 1 tab + 'help', I ran thefollowing commend: $ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'Signed-off-by: Masahiro Yamada List of files: /linux-6.15/fs/proc/Kconfig

0c1bc6b8 - docs: filesystems: fix renamed references

Tue, 14 Apr 2020 16:48:37 +0000

docs: filesystems: fix renamed referencesSome filesystem references got broken by a previous patchseries I submitted. Address those.Signed-off-by: Mauro Carvalho Chehab Acked-by: David Sterba # fs/affs/KconfigLink: https://lore.kernel.org/r/57318c53008dbda7f6f4a5a9e5787f4d37e8565a.1586881715.git.mchehab+huawei@kernel.orgSigned-off-by: Jonathan Corbet List of files: /linux-6.15/fs/proc/Kconfig

e79f15a4 - x86/resctrl: Add task resctrl information display

Wed, 15 Jan 2020 09:28:51 +0000

x86/resctrl: Add task resctrl information displayMonitoring tools that want to find out which resctrl control and monitorgroups a task belongs to must currently read the "tasks" file in everygroup until they locate the process ID.Add an additional file /proc/{pid}/cpu_resctrl_groups to provide thisinformation:1) res: mon:resctrl is not available.2) res:/ mon:Task is part of the root resctrl control group, and it is not associatedto any monitor group.3) res:/ mon:mon0Task is part of the root resctrl control group and monitor group mon0.4) res:group0 mon:Task is part of resctrl control group group0, and it is not associatedto any monitor group.5) res:group0 mon:mon1Task is part of resctrl control group group0 and monitor group mon1.Signed-off-by: Chen Yu Signed-off-by: Borislav Petkov Tested-by: Jinshi Chen Link: https://lkml.kernel.org/r/20200115092851.14761-1-yu.c.chen@intel.com List of files: /linux-6.15/fs/proc/Kconfig

3d82191c - fs/proc/Kconfig: fix indentation

Thu, 05 Dec 2019 00:50:11 +0000

fs/proc/Kconfig: fix indentationAdjust indentation from spaces to tab (+optional two spaces) as incoding style with command like: $ sed -e 's/^ / /' -i */Kconfig[adobriyan@gmail.com: add two spaces where necessary]Link: http://lkml.kernel.org/r/20191124133936.GA5655@avx2Signed-off-by: Krzysztof Kozlowski Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/Kconfig

c6c40533 - vmcore: add a kernel parameter novmcoredd

Tue, 16 Jul 2019 23:26:39 +0000

vmcore: add a kernel parameter novmcoreddSince commit 2724273e8fd0 ("vmcore: add API to collect hardware dump insecond kernel"), drivers are allowed to add device related dump data tovmcore as they want by using the device dump API. This has a potentialissue, the data is stored in memory, drivers may append too much dataand use too much memory. The vmcore is typically used in a kdump kernelwhich runs in a pre-reserved small chunk of memory. So as a result itwill make kdump unusable at all due to OOM issues.So introduce new 'novmcoredd' command line option. User can disabledevice dump to reduce memory usage. This is helpful if device dump isusing too much memory, disabling device dump could make sure a regularvmcore without device dump data is still available.[akpm@linux-foundation.org: tweak documentation][akpm@linux-foundation.org: vmcore.c needs moduleparam.h]Link: http://lkml.kernel.org/r/20190528111856.7276-1-kasong@redhat.comSigned-off-by: Kairui Song Acked-by: Dave Young Reviewed-by: Bhupesh Sharma Cc: Rahul Lakkireddy Cc: "David S . Miller" Cc: Eric Biederman Cc: Alexey Dobriyan Cc: Baoquan He Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/Kconfig

57043247 - docs: admin-guide: move sysctl directory to it

Mon, 22 Apr 2019 19:48:00 +0000

docs: admin-guide: move sysctl directory to itThe stuff under sysctl describes /sys interface from userspacepoint of view. So, add it to the admin-guide and remove the:orphan: from its index file.Signed-off-by: Mauro Carvalho Chehab List of files: /linux-6.15/fs/proc/Kconfig

68bc30bb - proc: Add /proc//arch_status

Thu, 06 Jun 2019 01:22:34 +0000

proc: Add /proc//arch_statusExposing architecture specific per process information is useful forvarious reasons. An example is the AVX512 usage on x86 which is importantfor task placement for power/performance optimizations.Adding this information to the existing /prcc/pid/status file would be theobvious choise, but it has been agreed on that a explicit arch_status fileis better in separating the generic and architecture specific information.[ tglx: Massage changelog ]Signed-off-by: Aubrey Li Signed-off-by: Thomas Gleixner Acked-by: Andrew Morton Cc: peterz@infradead.orgCc: hpa@zytor.comCc: ak@linux.intel.comCc: tim.c.chen@linux.intel.comCc: dave.hansen@intel.comCc: arjan@linux.intel.comCc: adobriyan@gmail.comCc: aubrey.li@intel.comCc: linux-api@vger.kernel.orgCc: Andy Lutomirski Cc: Peter Zijlstra Cc: Andi Kleen Cc: Tim Chen Cc: Dave Hansen Cc: Arjan van de Ven Cc: Alexey Dobriyan Cc: Linux API Link: https://lkml.kernel.org/r/20190606012236.9391-1-aubrey.li@linux.intel.com List of files: /linux-6.15/fs/proc/Kconfig

ec8f24b7 - treewide: Add SPDX license identifier - Makefile/Kconfig

Sun, 19 May 2019 12:07:45 +0000

treewide: Add SPDX license identifier - Makefile/KconfigAdd SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any formThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0-onlySigned-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/fs/proc/Kconfig

23c85094 - proc/kcore: add vmcoreinfo note to /proc/kcore

Wed, 22 Aug 2018 04:55:20 +0000

proc/kcore: add vmcoreinfo note to /proc/kcoreThe vmcoreinfo information is useful for runtime debugging tools, not justfor crash dumps. A lot of this information can be determined by othermeans, but this is much more convenient, and it only adds a page at mostto the file.Link: http://lkml.kernel.org/r/fddbcd08eed76344863303878b12de1c1e2a04b6.1531953780.git.osandov@fb.comSigned-off-by: Omar Sandoval Cc: Alexey Dobriyan Cc: Bhupesh Sharma Cc: Eric Biederman Cc: James Morse Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/Kconfig

2724273e - vmcore: add API to collect hardware dump in second kernel

Wed, 02 May 2018 09:47:17 +0000

vmcore: add API to collect hardware dump in second kernelThe sequence of actions done by device drivers to append their devicespecific hardware/firmware logs to /proc/vmcore are as follows:1. During probe (before hardware is initialized), device driversregister to the vmcore module (via vmcore_add_device_dump()), withcallback function, along with buffer size and log name needed forfirmware/hardware log collection.2. vmcore module allocates the buffer with requested size. It addsan Elf note and invokes the device driver's registered callbackfunction.3. Device driver collects all hardware/firmware logs into the bufferand returns control back to vmcore module.Ensure that the device dump buffer size is always aligned to page sizeso that it can be mmaped.Also, rename alloc_elfnotes_buf() to vmcore_alloc_buf() to make it moregeneric and reserve NT_VMCOREDD note type to indicate vmcore devicedump.Suggested-by: Eric Biederman .Signed-off-by: Rahul Lakkireddy Signed-off-by: Ganesh Goudar Signed-off-by: David S. Miller List of files: /linux-6.15/fs/proc/Kconfig

db5d5b36 - fs, proc: add help for CONFIG_PROC_CHILDREN

Fri, 17 Jul 2015 23:23:23 +0000

fs, proc: add help for CONFIG_PROC_CHILDRENThe purpose of the option was documented inDocumentation/filesystems/proc.txt but the help text was missing.Add small help text that also points to the documentation.Signed-off-by: Iago López Galeiras Reviewed-by: Jean Delvare Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/Kconfig

2e13ba54 - fs, proc: introduce CONFIG_PROC_CHILDREN

Thu, 25 Jun 2015 22:00:57 +0000

fs, proc: introduce CONFIG_PROC_CHILDRENCommit 818411616baf ("fs, proc: introduce /proc//task//childrenentry") introduced the children entry for checkpoint restore and thefile is only available on kernels configured with CONFIG_EXPERT andCONFIG_CHECKPOINT_RESTORE.This is available in most distributions (Fedora, Debian, Ubuntu, CoreOS)because they usually enable CONFIG_EXPERT and CONFIG_CHECKPOINT_RESTORE.But Arch does not enable CONFIG_EXPERT or CONFIG_CHECKPOINT_RESTORE.However, the children proc file is useful outside of checkpoint restore.I would like to use it in rkt. The rkt process exec() another programit does not control, and that other program will fork()+exec() a childprocess. I would like to find the pid of the child process from anexternal tool without iterating in /proc over all processes to findwhich one has a parent pid equal to rkt.This commit introduces CONFIG_PROC_CHILDREN and makesCONFIG_CHECKPOINT_RESTORE select it. This allows enabling/proc//task//children without needing to enableCONFIG_CHECKPOINT_RESTORE and CONFIG_EXPERT.Alban tested that /proc//task//children is present when thekernel is configured with CONFIG_PROC_CHILDREN=y but withoutCONFIG_CHECKPOINT_RESTORESigned-off-by: Iago López Galeiras Tested-by: Alban Crequy Reviewed-by: Cyrill Gorcunov Cc: Oleg Nesterov Cc: Kees Cook Cc: Pavel Emelyanov Cc: Serge Hallyn Cc: KAMEZAWA Hiroyuki Cc: Alexander Viro Cc: Andy Lutomirski Cc: Djalal Harouni Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/Kconfig

1c3fc3e5 - kcore: add Kconfig help text

Tue, 12 Nov 2013 23:11:16 +0000

kcore: add Kconfig help textUnder Pseudo filesystems, /proc/kcore support has no help.Fixes a portion of kernel bugzilla #52671: https://bugzilla.kernel.org/show_bug.cgi?id=52671Thanks for David Howells for the help text.Signed-off-by: Randy Dunlap Reported-by: Signed-off-by: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/Kconfig

6a108a14 - kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT

Thu, 20 Jan 2011 22:44:16 +0000

kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERTThe meaning of CONFIG_EMBEDDED has long since been obsoleted; the optionis used to configure any non-standard kernel with a much larger scope thanonly small devices.This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixesreferences to the option throughout the kernel. A new CONFIG_EMBEDDEDoption is added that automatically selects CONFIG_EXPERT when enabled andcan be used in the future to isolate options that should only beconsidered for embedded systems (RISC architectures, SLOB, etc).Calling the option "EXPERT" more accurately represents its intention: onlyexpert users who understand the impact of the configuration changes theyare making should enable it.Reviewed-by: Ingo Molnar Acked-by: David Woodhouse Signed-off-by: David Rientjes Cc: Greg KH Cc: "David S. Miller" Cc: Jens Axboe Cc: Arnd Bergmann Cc: Robin Holt Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/Kconfig

a4f7326d - vmcore: it is not experimental any more

Tue, 26 Oct 2010 21:21:21 +0000

vmcore: it is not experimental any moreWe use vmcore in our production kernel for a long time, it is prettystable now. So I don't think we need to mark it as experimental any more.Signed-off-by: WANG Cong Acked-by: Neil Horman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/Kconfig

53167a3e - proc: move PROC_PAGE_MONITOR to fs/proc/Kconfig

Thu, 02 Oct 2008 22:01:51 +0000

proc: move PROC_PAGE_MONITOR to fs/proc/KconfigSigned-off-by: Alexey Dobriyan List of files: /linux-6.15/fs/proc/Kconfig