[Crash-utility] crash version 4.0-7.5 is available

Changelog for crash version 4.0-7.5: - Fix for "kmem -i" and "kmem -p" on 2.6.26 x86 CONFIG_SPARSEMEM PAE kernels to account for the change in value of SECTION_SIZE_BITS. (oomichi(a)mxs.nes.nec.co.jp) - Fix for "bt -[tT]" options on x86 architectures when the backtrace starts on the hard IRQ stack. Without the patch, the backtrace may not properly make the transition back to the process stack. (anderson(a)redhat.com) - Fix for the "bt" command when run on a xen hypervisor in which the backtrace leads to either "process_softirqs" or "page_fault". Without the patch, the backtrace indicates: "bt: cannot resolve stack trace", and then the recovery code terminates the command with the nonsensical error message: "bt: invalid structure size: task_struct". (oda(a)valinux.co.jp, anderson(a)redhat.com) - Fix for the "kmem -[sS]" options that could cause a segmentation violation or bogus "bad slab pointer" and "bad inuse counter" error messages. Reported on 2.6.25-based CONFIG_DEBUG_SLAB kernels, but could conceivably occur on any kernel with a kmem_cache.nodelists[] array. (anderson(a)redhat.com) - Fix for a bug in the SIAL extension when dealing with bitfields. (olaf(a)sgi.com, hedi(a)sgi.com) - Fix for the "files" command when run on 2.6.25 and later kernels, which would either fail with an "invalid kernel virtual address" error of type "fill_dentry_cache", or would show nonsensical/garbage "ROOT" and "CWD" pathnames. This was due to the change in format of the kernel's fs_struct. (anderson(a)redhat.com) - Addition of a new "null-stop" environment variable that can be turned on/off with the "set" command. It simply controls the embedded gdb's "null-stop" print setting, which, if on, will stop printing character arrays when the first NULL is encountered. The default setting is still "off", so there will be no behavioral changes unless it is turned on during runtime or in .crashrc files. (anderson(a)redhat.com) - Fix for the builtin "g" alias, which would fail with an "Ambiguous command" error from the embedded gdb module. (anderson(a)redhat.com) - Fix to handle the 2.6.27 kernel's change of the module structure's num_symtab, core_size and core_text_size members from long to int. Without the patch, initialization-time failures would result when running against 64-bit big-endian kernels, and potentially on little- endian 64-bit kernels. (bwalle(a)suse.de) - Implement support for the /dev/crash driver being built into x86 or x86_64 Red Hat kernels with the restricted /dev/mem driver. Without the patch, if the kernel was built with CONFIG_CRASH configured as "y" instead of "m", and crash was run against the resultant live kernel, it would fail during initialization attempting to use the restricted /dev/mem device. (anderson(a)redhat.com) - If the /dev/crash driver module has been loaded prior to a live crash session, then it will not be unloaded when the crash session exits. Normally the module gets loaded by the crash utility during its initialization on a live system, and then unloaded when the crash session exits, regardless whether the module was loaded by the crash utility itself or if it was pre-loaded manually. However, if a cpu subsequently hangs, then a live crash session attempt would also hang when it tries to load the module. This patch will allow the crash.ko module to be pre-loaded -- for example during kernel boot-time -- and if a cpu subsequently hangs, a live crash session can be initiated to investigate the problem. (anderson(a)redhat.com) - Fix to recognize the 2.6.25 re-naming of the x86 user_regs_struct structure members. Without the patch, running against a kdump dumpfile would fail with the error: "crash: invalid structure member offset: user_regs_struct_ebp". (anderson(a)redhat.com) - Fix for initialization-time failure when running against 2.6.27 x86_64 xen kernels, which indicate "crash: cannot resolve: end_pfn". (bwalle(a)suse.de) - Fix for initialization-time failure when running against Xen 4.4 hypervisor binaries, which indicate "crash: invalid structure member offset: domain_is_polling". (bwalle(a)suse.de) - Added a new "p -u" option, which indicates that the gdb expression argument evaluates to a user virtual address in the current context. This option could be used, for example, if a known kernel data structure exists at user virtual address in the current context, or if the debuginfo data of a user program were loaded into the crash session via the gdb "add-symbol-file" command. (anderson(a)redhat.com) - Fix for "bt -a" command when running against the xen hypervisor where the number of physical cpus outnumber the MAX_VIRT_CPUS value for the processor type. Without the patch on such a system, "bt -a" would fail after displaying backtraces for the first 32 (MAX_VIRT_CPUS) pcpus with the the error message: "bt: invalid vcpu". The patch also corrects the "vcpus" command output to show the vcpus associated with pcpus 32 through 63, and the "doms" command output to show the second idle domain associated with pcpus 32 through 63. (oda(a)valinux.co.jp) - Fix for the display of the processor speed on IBM Power6 hardware. Without the patch, "MACHINE: ppc64 (unknown Mhz)" would be displayed upon initialization and by the "sys" command. (sachinp(a)in.ibm.com, acv(a)linux.vnet.ibm.com) Download from: http://people.redhat.com/anderson