user/sven/linux.git/Documentation/kdump, branch v4.19.135

kexec/kdump: minor Documentation updates for arm64 and Image

2017-07-12T23:26:00Z

Minor updates in Documentation for arm64 as relocatable kernel. Also this patch updates documentation for using uncompressed image "Image" which is used for ARM64. Link: http://lkml.kernel.org/r/1495104793-6563-1-git-send-email-Bharat.Bhushan@nxp.com Signed-off-by: Bharat Bhushan Cc: Dave Young Cc: Baoquan He Cc: Vivek Goyal Cc: Jonathan Corbet Cc: AKASHI Takahiro Cc: Pratyush Anand Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Documentation: kdump: describe arm64 port

2017-04-05T17:32:32Z

Add arch specific descriptions about kdump usage on arm64 to kdump.txt. Signed-off-by: AKASHI Takahiro Reviewed-by: Baoquan He Acked-by: Dave Young Acked-by: Catalin Marinas Signed-off-by: Catalin Marinas

Documentation: kdump: Add description of enable multi-cpus support

2016-09-21T00:02:54Z

Multi-cpu support is useful to improve the performance of kdump in some cases. So add the description of enable multi-cpu support in dump-capture kernel. Signed-off-by: Zhou Wenjian Acked-by: Baoquan He Acked-by: Xunlei Pang Signed-off-by: Jonathan Corbet

Documentation: kdump: Remind user of nr_cpus

2016-09-21T00:02:49Z

nr_cpus can help to save memory. So we should remind user of it. Signed-off-by: Zhou Wenjian Acked-by: Baoquan He Acked-by: Xunlei Pang Signed-off-by: Jonathan Corbet

kdump: fix dmesg gdbmacro to work with record based printk

2016-06-03T22:06:22Z

Commit 7ff9554bb578 ("printk: convert byte-buffer to variable-length record buffer") introduced a record based printk buffer. Modify gdbmacros.txt to parse this new structure so dmesg will work properly. Link: http://lkml.kernel.org/r/1463515794-1599-1-git-send-email-minyard@acm.org Signed-off-by: Corey Minyard Cc: Dave Young Cc: Baoquan He Cc: Vivek Goyal Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kdump: fix gdb macros work work with newer and 64-bit kernels

2016-05-24T00:04:14Z

Lots of little changes needed to be made to clean these up, remove the four byte pointer assumption and traverse the pid queue properly. Also consolidate the traceback code into a single function instead of having three copies of it. Link: http://lkml.kernel.org/r/1462926655-9390-1-git-send-email-minyard@acm.org Signed-off-by: Corey Minyard Acked-by: Baoquan He Cc: Vivek Goyal Cc: Haren Myneni Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ARM: kexec: fix crashkernel= handling

2016-05-03T10:13:45Z

When the kernel crashkernel parameter is specified with just a size, we are supposed to allocate a region from RAM to store the crashkernel. However, ARM merely reserves physical address zero with no checking that there is even RAM there. Fix this by lifting similar code from x86, importing it to ARM with the ARM specific parameters added. In the absence of any platform specific information, we allocate the crashkernel region from the first 512MB of physical memory. Update the kdump documentation to reflect this change. Signed-off-by: Russell King Reviewed-by: Pratyush Anand

kernel: add panic_on_warn

2014-12-11T01:41:10Z

There have been several times where I have had to rebuild a kernel to cause a panic when hitting a WARN() in the code in order to get a crash dump from a system. Sometimes this is easy to do, other times (such as in the case of a remote admin) it is not trivial to send new images to the user. A much easier method would be a switch to change the WARN() over to a panic. This makes debugging easier in that I can now test the actual image the WARN() was seen on and I do not have to engage in remote debugging. This patch adds a panic_on_warn kernel parameter and /proc/sys/kernel/panic_on_warn calls panic() in the warn_slowpath_common() path. The function will still print out the location of the warning. An example of the panic_on_warn output: The first line below is from the WARN_ON() to output the WARN_ON()'s location. After that the panic() output is displayed. WARNING: CPU: 30 PID: 11698 at /home/prarit/dummy_module/dummy-module.c:25 init_dummy+0x1f/0x30 [dummy_module]() Kernel panic - not syncing: panic_on_warn set ... CPU: 30 PID: 11698 Comm: insmod Tainted: G W OE 3.17.0+ #57 Hardware name: Intel Corporation S2600CP/S2600CP, BIOS RMLSDP.86I.00.29.D696.1311111329 11/11/2013 0000000000000000 000000008e3f87df ffff88080f093c38 ffffffff81665190 0000000000000000 ffffffff818aea3d ffff88080f093cb8 ffffffff8165e2ec ffffffff00000008 ffff88080f093cc8 ffff88080f093c68 000000008e3f87df Call Trace: [] dump_stack+0x46/0x58 [] panic+0xd0/0x204 [] ? init_dummy+0x1f/0x30 [dummy_module] [] warn_slowpath_common+0xd0/0xd0 [] ? dummy_greetings+0x40/0x40 [dummy_module] [] warn_slowpath_null+0x1a/0x20 [] init_dummy+0x1f/0x30 [dummy_module] [] do_one_initcall+0xd4/0x210 [] ? __vunmap+0xc2/0x110 [] load_module+0x16a9/0x1b30 [] ? store_uevent+0x70/0x70 [] ? copy_module_from_fd.isra.44+0x129/0x180 [] SyS_finit_module+0xa6/0xd0 [] system_call_fastpath+0x12/0x17 Successfully tested by me. hpa said: There is another very valid use for this: many operators would rather a machine shuts down than being potentially compromised either functionally or security-wise. Signed-off-by: Prarit Bhargava Cc: Jonathan Corbet Cc: Rusty Russell Cc: "H. Peter Anvin" Cc: Andi Kleen Cc: Masami Hiramatsu Acked-by: Yasuaki Ishimatsu Cc: Fabian Frederick Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Documentation/kdump/kdump.txt: add ARM description

2014-08-29T23:28:17Z

Add arm specific parts to kdump kernel documentation. Signed-off-by: Hu Keping Acked-by: Vivek Goyal Cc: Haren Myneni Cc: Rob Landley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2013-07-04T18:40:58Z

Pull trivial tree updates from Jiri Kosina: "The usual stuff from trivial tree" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (34 commits) treewide: relase -> release Documentation/cgroups/memory.txt: fix stat file documentation sysctl/net.txt: delete reference to obsolete 2.4.x kernel spinlock_api_smp.h: fix preprocessor comments treewide: Fix typo in printk doc: device tree: clarify stuff in usage-model.txt. open firmware: "/aliasas" -> "/aliases" md: bcache: Fixed a typo with the word 'arithmetic' irq/generic-chip: fix a few kernel-doc entries frv: Convert use of typedef ctl_table to struct ctl_table sgi: xpc: Convert use of typedef ctl_table to struct ctl_table doc: clk: Fix incorrect wording Documentation/arm/IXP4xx fix a typo Documentation/networking/ieee802154 fix a typo Documentation/DocBook/media/v4l fix a typo Documentation/video4linux/si476x.txt fix a typo Documentation/virtual/kvm/api.txt fix a typo Documentation/early-userspace/README fix a typo Documentation/video4linux/soc-camera.txt fix a typo lguest: fix CONFIG_PAE -> CONFIG_x86_PAE in comment ...