that that are configured with CONFIG_RANDOMIZE_BASE. When set to
"auto", the KASLR relocation value will be determined automatically
by comparing the "_stext" symbol value compiled into the vmlinux file
with the _stext symbol value stored in kdump vmcoreinfo data; on live
systems the comparison will be made with the "_stext" symbol value
that is found in /proc/kallsyms.
(ahonig@google.com, anderson@redhat.com)
X86_64 kernels that are configured with CONFIG_RANDOMIZE_BASE.
The offset value must be equal to the difference between the
symbol values compiled into the vmlinux file and their relocated
value.
(ahonig@google.com, anderson@redhat.com)
later kernels configured with CONFIG_SLAB, running against vmcore
files filtered with the makedumpfile(8) facility. Without the
patch, the message "crash: page excluded: kernel virtual address:
<address> type: kmem_cache buffer" is immediately followed by
the message "crash: unable to initialize kmem slab cache subsystem".
Because of a kernel data structure name change from "cache_cache" to
"kmem_cache_boot", the crash utility failed to properly downsize
the stored size of the kernel's kmem_cache data structure from the
size indicated by the vmlinux debuginfo data. This in turn could
lead to reading beyond the end of a kmem_cache data structure into
a page of memory that had been excluded from the vmcore. The fix
was also applied to kernels configured with CONFIG_SLUB.
(anderson@redhat.com)
context_switch() function so that it is not an inline function.
Without the patch, the message "crash: cannot determine thread return
address" is displayed during invocation, and backtraces of blocked
tasks may have missing or invalid frames.
(ahonig@google.com)
occurred in a KVM guest running a Linux 2.6.38 or later kernel.
Without the patch, the exception frame register dump is not displayed
above the "async_page_fault" stack frame.
(anderson@redhat.com)
generated by the invalid contents of the RIP register. Without
the patch, the exception frame register dump is not displayed
above the "page_fault" stack frame; and in a related issue, the
"bt -e" option will not find and display the exception frame.
(anderson@redhat.com)
the function frame that called into a function that was interrupted.
Without the patch, the first frame just above an IRQ exception frame
register dump may show an invalid/stale function.
(anderson@redhat.com)
indicating "WARNING: possibly bogus exception frame" generated
from a task that was in the process of being exec'd from a kernel
thread via the call_usermodehelper() facility.
(anderson@redhat.com)
a slab object, consisting of the slab cache name and the address
value, separated by a colon, and encompassed in brackets:
[slab-cache-name:address]
Enhanced the "bt -F" option such that if "-F" is entered twice,
and if the stack frame contents reference a slab cache object, both
the slab cache name and the stack contents will be displayed within
brackets.
Enhanced the "rd -S" option such that if "-S" is entered twice,
and if the memory contents reference a slab cache object, both the
slab cache name and the memory contents will be displayed within
brackets.
(anderson@redhat.com)
"-i <file>" command line option, or when accepting input from a
file as a set of commands or as a set of command arguments using the
"<" redirection character, unconditionally cease the operation if
CTRL-c is entered. Without the patch, depending upon the command
that was running when the SIGINT was received, the operation may
continue uninterruptibly until the file contents are consumed.
(anderson@redhat.com)
CONFIG_SLUB. Eash per-cpu slab object dump may show incorrect
ALLOCATED and FREE values; and as seen on Linux 3.5 and later
kernels, the TOTAL value and the number of individual objects dumped
may also be incorrect (too small).
(anderson@redhat.com)
Please enter the c mmit message for your changes. Lines starting
configured with CONFIG_SLUB. Because the the page structure's inuse
and objects fields used by SLUB were changed from discrete u16 types
to bit-fields within an unsigned int, the display of per-node partial
slab statistics are incorrect. Without the patch, the TOTAL and
ALLOCATED values are incorrectly shown as equal values, and therefore
the FREE value is always zero.
(anderson@redhat.com)
the patch, running against a Xen 4.4 hypervisor binary would fail
during session initialization with the error message "crash: invalid
structure member offset: domain_is_hvm". In addition, the PVH guest
type is being registered internally as an HVM guest type, the debug
"help -X ofs" command's display of the domain_domain_flags offset
has been fixed to show it in decimal, and the setting of the internal
dc->domain_flags has been fixed to contain all flags set, not just
the first one found.
(dslutz@verizon.com)
CONFIG_FAIR_GROUP_SCHED, but not CONFIG_CFS_BANDWIDTH. Without the
patch, the command fails with the message "runq: invalid structure
member offset: cfs_rq_throttled".
(vinayakm.list@gmail.com)
