[Crash-utility] crash version 4.0-4.13 is available
Changelog:
- If the vmlinux file or dumpfile is a machine type mismatch with
the crash utility binary, or far less likely, a ppc64 or ia64
endian mismatch, the crash session will fail during initialization
with the generic error message, "crash: <filename>: not a
supported file format". To aid the user in understanding what
caused the failure, this patch prepends an additional error
message that clarifies the reason behind the mismatch.
(anderson(a)redhat.com, bwalle(a)suse.de)
- An update for "kmem -V" option, which currently displays the kernel's
"vm_stat" counter values, will now also display the
"vm_event_states"
counter values, both of which were introduced in 2.6.18. For 2.6
kernels prior to 2.6.18, the precursor "page_states" counter values
will be displayed. (anderson(a)redhat.com)
- Implemented a new "kmem -z" option to display per-zone memory
statistics. The amount of data displayed is dependent upon the
kernel version. At a minimum, the size, min/low/high and free
page counts are shown. If the zone struct contains nr_active,
nr_inactive, pages_scanned and all_unreclaimable members, those
fields are shown. If the zone struct contains a per-zone vm_stat[]
array (identical to the system-wide vm_stat[] array), its contents
are dumped. For any other data in the zone, the address of the
zone structure is displayed.
(anderson(a)redhat.com)
- Fix for the RSS amounts displayed by the "ps" and "vm" commands
on 2.6 kernels prior to 2.6.13. (anderson(a)redhat.com)
- Fix for the x86 "bt" command when running a version of crash built
on a pre-2.6.20 host against a 2.6.20 or later dumpfile, or when
running a version of crash build on a 2.6.20 or later host against
a pre-2.6.20 dumpfile. Without the patch, kernel exception frames
would be mistaken for, and displayed as, user exception frames, and
parts of the backtrace above the kernel exception frame would be
truncated. (atyson(a)hp.com)
- Fix for FC8 xen x86 kernels (2.6.21-2952.fc8xen) that fail during
initialization after reporting "WARNING: cannot read linux_banner
string", followed by the fatal error message "crash: vmlinux and
vmcore do not match!". This required a change to the virtual
address mask value used to determine the base value of the x86
kernel's unity-mapped virtual address region. (anderson(a)redhat.com)
- Set a default "phys_base" value for recent fully-virtualized
relocatable x86_64 kernels whose text start address is not equal
to the __START_KERNEL_map value. Without the patch, the crash
session fails during initialization with the warning message
"WARNING: cannot read linux_banner string", followed by the fatal
error message "crash: vmlinux and vmcore do not match!". The
error can alternatively be worked around if the "phys_base" value
is first determined by running a crash session on the live system
that generated the dumpfile, by entering: "help -m | grep phys_base".
The value shown can then be used when running against the dumpfile
like so: "crash --machdep phys_base=<value> vmlinux vmcore"
(anderson(a)redhat.com)
- Debug: implemented a new "--active" crash command line option, which
will gather only the active tasks from each runqueue, skipping the
traversal of the kernel's pid_hash mechanism.
(anderson(a)redhat.com)
- Debug: "help -n" formats and displays ASCII VMCOREINFO data.
(anderson(a)redhat.com)
Download from: http://people.redhat.com/anderson