[Crash-utility] [ANNOUNCE] crash version 5.1.6 is available

[Dave Anderson]

Download from: http://people.redhat.com/anderson

Changelog:

 - Fixed several typos in the updated crash.8 man page.
   (bob.montgomery at hp.com)
 
 - Created a new "rd -a" option that displays printable ASCII data only,
   starting from the specified location.  If a "count" argument is not 
   entered, the display stops upon encountering the first non-printable
   character.
   (anderson at redhat.com)

 - Fix for the "search -k" option on X86 kernels whose first memmap page
   structure does not map to physical address 0.  Without the patch, the 
   identity-mapped region of the first memory node would not be searched.
   (anderson at redhat.com)

 - Fix for the "search -k" option in the highly unlikely case of kernels
   that have multiple NUMA nodes that are not sequential with respect to
   their node IDs and the physical memory they reference, have physical
   memory holes between any of the nodes, and do not have memmap page 
   structures referencing the non-existent inter-node physical memory.
   In that event, it is conceivable that a NUMA node would be skipped.
   (anderson at redhat.com)

 - If the "kmem <address>" argument is a virtual address inside a 
   kernel module, the first item displayed is the address, followed by 
   its symbol type, and its symbol-name-plus-offset string.  This patch 
   appends the module name in brackets, similar to what is displayed if 
   "sym <address>" is entered.
   (anderson at redhat.com)
   
 - Fix for "kmem -s <address>" in kernels configured with CONFIG_SLUB
   and CONFIG_PAGEFLAGS_EXTENDED if the address is contained in a page 
   other than the first page in a compound, multi-page, slab.  Without
   the patch, the command would fail with the message "kmem: address is 
   not allocated in slab subsystem: <address>".
   (anderson at redhat.com)

 - Created a new "rd -N" option that displays 16- and 32-bit data in
   network byte order, performing byte-swapping if appropriate.
   (makc at gmx.co.uk)

 - Fix for a compiler warning when building with "make warn".  Without
   the patch, memory.c generates a message indicating "kernel.c: In 
   function ‘back_trace’:" followed by 17 messages indicating "kernel.c:
   2187: warning: ‘btsave.<member>’ may be used uninitialized in this
   function", where there is one message for each <member> of the 
   bt_info structure.
   (anderson at redhat.com)

 - Updated the #define of NR_SECTION_ROOTS to match its change upstream
   that prevents its value from being calculated to be zero.
   (takuo.koguchi.sw at hitachi.com, anderson at redhat.com)

 - Fix for a double-free() in the unlikely event of a readmem() failure
   in the ARM architecture's read_module_unwind_table() function.
   (mika.westerberg at iki.fi)

 - Updates to support CONFIG_SPARSEMEM for the ARM architecture.
   (mika.westerberg at iki.fi)

 - Extended the "mach" command to display the size and address of each
   per-cpu IRQ stack and per-cpu exception stack, if they exist.  This 
   extension is applicable to the x86_64 and ppc64 architectures, and 
   the x86 architecture if applicable.  Prior to this patch, the values
   were only accessible via "help -t" or "help -m". 
   (anderson at redhat.com)

 - Created a new "kmem -o" option that dumps each cpu's offset value 
   that is added to per-cpu symbol values to translate them into kernel 
   virtual addresses.  Prior to this patch, the values were only
   accessible via "help -k".           
   (anderson at redhat.com)

 - Removed the "kmem [-[l|L][a|i]]" options from being advertised by
   the "kmem" help page; the options have been obsolete since the Linux 
   version 2.2 timeframe.
   (anderson at redhat.com)

 - Fix to support Linux 3.x version number change.  Without the patch,
   the crash session fails with kernel version 3.0 and later, displaying
   the message "WARNING: kernel version inconsistency between vmlinux 
   and [live memory or dumpfile]", followed by the fatal error message 
   "crash: incompatible arguments: vmlinux is not SMP -- [live system or
   dumpfile] is SMP".
   (sebott at linux.vnet.ibm.com, anderson at redhat.com)

 - Updates to the sial.c extension module to support the Linux 3.x 
   version number change.  
   (sebott at linux.vnet.ibm.com, Luc.Chouinard at trueposition.com)

 - Created a new "kmem -g [flags]" option that displays the enumerator
   value of bits in the page structure's "flags" field.  With no "flags"
   argument, the enumerator value of all bits are displayed; when a
   hexadecimal "flags" option is added, just the bits in the value are 
   translated.  This option only works with 2.6.26 and later kernels,
   which contain the "enum pageflags".   
   (anderson at redhat.com)