linux-toradex.git/Documentation/kdump, branch v3.14.57

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

2013-07-04T18:40:58+00:00

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
  ...

Documentation/kdump/kdump.txt: remove /dev/oldmem description

2013-07-03T23:08:03+00:00

Signed-off-by: Zhang Yanfei 
Cc: Vivek Goyal 
Cc: "Eric W. Biederman" 
Cc: "H. Peter Anvin" 
Cc: Benjamin Herrenschmidt 
Cc: Dave Hansen 
Cc: Fenghua Yu 
Cc: Heiko Carstens 
Cc: Martin Schwidefsky 
Cc: Matt Fleming 
Cc: Michael Holzheu 
Cc: Paul Mackerras 
Cc: Ralf Baechle 
Cc: Tony Luck 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Documentation/kdump: Remove TODO in this document

2013-05-28T10:02:13+00:00

We have already had the relocatable kernel, so just remove
the TODO in the kdump document.

Signed-off-by: Zhang Yanfei 
Acked-by: Rob Landley 
Acked-by: Vivek Goyal 
Signed-off-by: Jiri Kosina

Add size restriction to the kdump documentation

2013-04-02T16:40:03+00:00

In efi_init() memory aligns in IA64_GRANULE_SIZE(16M). If set "crashkernel=1024M-:600M"
and use sparse memory model, when crash kernel booting it changes [128M-728M] to [128M-720M].

But initrd memory is in [709M-727M], and virt_addr_valid() *can not* check the invalid pages
when freeing initrd memory, because there are some pages missed at the end of the section,
and this causes error.

...
Unpacking initramfs...
Freeing initrd memory: 19648kB freed
BUG: Bad page state in process swapper  pfn:02d00
page:e0000000102dd800 flags:(null) count:0 mapcount:1 mapping:(null) index:0

Call Trace:
 [] show_stack+0x80/0xa0
                                sp=e000000021e8fbd0 bsp=e000000021e81360
 [] dump_stack+0x30/0x50
                                sp=e000000021e8fda0 bsp=e000000021e81348
 [] bad_page+0x280/0x380
                                sp=e000000021e8fda0 bsp=e000000021e81308
 [] free_hot_cold_page+0x3a0/0x5c0
                                sp=e000000021e8fda0 bsp=e000000021e812a0
 [] free_hot_page+0x30/0x60
                                sp=e000000021e8fda0 bsp=e000000021e81280
 [] __free_pages+0xb0/0xe0
                                sp=e000000021e8fda0 bsp=e000000021e81258
 [] free_pages+0xa0/0xc0
                                sp=e000000021e8fda0 bsp=e000000021e81230
 [] free_initrd_mem+0x230/0x290
                                sp=e000000021e8fda0 bsp=e000000021e811d8
 [] populate_rootfs+0x1c0/0x280
                                sp=e000000021e8fdb0 bsp=e000000021e811a0
 [] do_one_initcall+0x3b0/0x3e0
                                sp=e000000021e8fdb0 bsp=e000000021e81158
 [] kernel_init+0x3f0/0x4b0
                                sp=e000000021e8fdb0 bsp=e000000021e81108
 [] kernel_thread_helper+0xd0/0x100
                                sp=e000000021e8fe30 bsp=e000000021e810e0
 [] start_kernel_thread+0x20/0x40
                                sp=e000000021e8fe30 bsp=e000000021e810e0
...

In "http://marc.info/?l=linux-arch&m=136147092429314&w=2" Tony said:
"Perhaps in Documentation/kdump/kdump.txt (which the crashkernel entry
in kernel-parameters.txt points at).  The ia64 section of kdump.txt
notes that the start address will be rounded up to a GRANULE boundary,
but doesn't talk about restrictions on the size."

This patch add size restriction to the documentation of kdump.

Signed-off-by: Xishi Qiu 
Signed-off-by: Tony Luck

kexec: update URL of kexec homepage

2012-07-19T01:35:57+00:00

The referenced html file does not exist anymore. Replace the URL with
the current project homepage.

Signed-off-by: Olaf Hering 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[S390] Add s390x description to Documentation/kdump/kdump.txt

2011-12-27T10:27:13+00:00

Add s390x specific parts to kdump kernel documentation.

Signed-off-by: Michael Holzheu 
Signed-off-by: Martin Schwidefsky

kdump: update kexec-tools URL and Vivek's email

2010-11-25T13:36:38+00:00

Signed-off-by: Simon Horman 
Signed-off-by: Jiri Kosina

trivial: Miscellaneous documentation typo fixes

2009-06-12T16:01:47+00:00

Fix various typos in documentation txts.

Signed-off-by: Matt LaPlante 
Signed-off-by: Jiri Kosina

powerpc: Support for relocatable kdump kernel

2008-10-22T04:01:22+00:00

This adds relocatable kernel support for kdump. With this one can
use the same regular kernel to capture the kdump. A signature (0xfeed1234)
is passed in r6 from panic code to the next kernel through kexec_sequence
and purgatory code. The signature is used to differentiate between
kdump kernel and non-kdump kernels.

The purgatory code compares the signature and sets the __kdump_flag in
head_64.S.  During the boot up, kernel code checks __kdump_flag and if it
is set, the kernel will behave as relocatable kdump kernel. This kernel
will boot at the address where it was loaded by kexec-tools ie. at the
address reserved through crashkernel boot parameter.

CONFIG_CRASH_DUMP depends on CONFIG_RELOCATABLE option to build kdump
kernel as relocatable. So the same kernel can be used as production and
kdump kernel.

This patch incorporates the changes suggested by Paul Mackerras to avoid
GOT use and to avoid two copies of the code.

Signed-off-by: Paul Mackerras 
Signed-off-by: Mohan Kumar M 
Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

kdump: update kdump documentation as kexec-tools-resting has been renamed kexec-tools

2008-07-28T23:30:21+00:00

Signed-off-by: Simon Horman 
Acked-by: Vivek Goyal 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds