3:07 p.m.
- Addressed a number of issues associated with CONFIG_SPARSEMEM
kernels and kernels using updated manners for the linkage of
their pglist_data structures, and pointers to their mem_map arrays.
(anderson(a)redhat.com)
- Implemented "kmem -n" for CONFIG_SPARSEMEM kernels; in addition
to the pgdat- and zone-related data command output, it also
displays a list of the SPARSEMEM mem_sections. Here is an
example from an ia64:
crash> kmem -n
NODE SIZE PGLIST_DATA BOOTMEM_DATA NODE_ZONES
0 2359296 e000000008c00000 a000000100749b70 e000000008c00000
e000000008c02400
e000000008c04800
e000000008c06c00
MEM_MAP START_PADDR START_MAPNR
e0000001040a3f00 0 0
ZONE NAME SIZE MEM_MAP START_PADDR START_MAPNR
0 DMA 262144 e0000001040a3f00 0 0
1 DMA32 0 0 0 0
2 Normal 2097152 e0000001048a3f00 100000000 262144
3 HighMem 0 0 0 0
-------------------------------------------------------------------
NR SECTION CODED_MEM_MAP MEM_MAP PFN
0 e00000010409ff00 e0000001040a3f00 e0000001040a3f00 0
1 e00000010409ff08 e0000001040a3f00 e0000001044a3f00 65536
4 e00000010409ff20 e0000001038a3f00 e0000001048a3f00 262144
5 e00000010409ff28 e0000001038a3f00 e000000104ca3f00 327680
6 e00000010409ff30 e0000001038a3f00 e0000001050a3f00 393216
7 e00000010409ff38 e0000001038a3f00 e0000001054a3f00 458752
8 e00000010409ff40 e0000001038a3f00 e0000001058a3f00 524288
9 e00000010409ff48 e0000001038a3f00 e000000105ca3f00 589824
10 e00000010409ff50 e0000001038a3f00 e0000001060a3f00 655360
11 e00000010409ff58 e0000001038a3f00 e0000001064a3f00 720896
12 e00000010409ff60 e0000001038a3f00 e0000001068a3f00 786432
13 e00000010409ff68 e0000001038a3f00 e000000106ca3f00 851968
14 e00000010409ff70 e0000001038a3f00 e0000001070a3f00 917504
15 e00000010409ff78 e0000001038a3f00 e0000001074a3f00 983040
16 e00000010409ff80 e0000001038a3f00 e0000001078a3f00 1048576
17 e00000010409ff88 e0000001038a3f00 e000000107ca3f00 1114112
18 e00000010409ff90 e0000001038a3f00 e0000001080a3f00 1179648
19 e00000010409ff98 e0000001038a3f00 e0000001084a3f00 1245184
20 e00000010409ffa0 e0000001038a3f00 e0000001088a3f00 1310720
21 e00000010409ffa8 e0000001038a3f00 e000000108ca3f00 1376256
22 e00000010409ffb0 e0000001038a3f00 e0000001090a3f00 1441792
23 e00000010409ffb8 e0000001038a3f00 e0000001094a3f00 1507328
34 e0000001040a0010 e0000001010a3f00 e0000001098a3f00 2228224
35 e0000001040a0018 e0000001010a3f00 e000000109ca3f00 2293760
crash>
(anderson(a)redhat.com)
- Fix for "kmem -i" failure in CONFIG_SPARSEMEM kernels that would
typically fail with the error message: "kmem: invalid kernel virtual
address: 0 type: node_zones free_pages". (anderson(a)redhat.com)
- Fix for "kmem -f" failure in CONFIG_SPARSEMEM kernels that would
typically fail with the error message: "kmem: invalid kernel virtual
address: ab8 type: node_zones name". (anderson(a)redhat.com)
- Fix for "kmem -f" failure in 2.6.17 kernels (possibly earlier) that
would fail with the error message: "kmem: invalid structure member
offset: zone_zone_mem_map". (anderson(a)redhat.com)
- Fix for "kmem [address]" failure in 2.6.17 kernels (possibly earlier)
that would fail with the error message: "kmem: invalid structure
member offset: zone_zone_mem_map". (anderson(a)redhat.com)
- Fix for "kmem -i" that resulted in a bogus "CACHED" page count
value. (anderson(a)redhat.com)
- As an result of the last "kmem -i" fix, I've added a new "kmem
-V"
option that dumps the kernel's new vm_stat[] array contents by
their enum values:
crash> kmem -V
NR_ANON_PAGES: 38656
NR_FILE_MAPPED: 3116
NR_FILE_PAGES: 141106
NR_SLAB: 58605
NR_PAGETABLE: 1059
NR_FILE_DIRTY: 7
NR_WRITEBACK: 0
NR_UNSTABLE_NFS: 0
NR_BOUNCE: 0
NUMA_HIT: 86475467
NUMA_MISS: 0
NUMA_FOREIGN: 0
NUMA_INTERLEAVE_HIT: 31523
NUMA_LOCAL: 86475467
NUMA_OTHER: 0
crash>
Interally, a new dump_vm_stat() function has been added to access
any of the items in the list. (anderson(a)redhat.com)
- Implemented support for relocatable x86_64 live kernels and kdump
generated vmcores. Without this patch, attempts to analyze those
kernels would fail during initialization with the error message:
"crash: vmlinux and vmcore do not match!" (anderson(a)redhat.com)
- Support for recognizing real-time signals in the "sig" command.
(olivier.daudel(a)u-paris10.fr)
- Fix for "sys -c" display of "sys_ni_syscall" entries that showed
different system call names that have the same (W) symbol value
as the (T) symbol "sys_ni_syscall". For example:
crash> sym -l | grep ffffffff802a38b6
ffffffff802a38b6 (W) compat_sys_ipc
ffffffff802a38b6 (W) compat_sys_keyctl
ffffffff802a38b6 (W) compat_sys_sysctl
ffffffff802a38b6 (W) ppc_rtas
ffffffff802a38b6 (T) sys_ni_syscall
ffffffff802a38b6 (W) sys_pciconfig_iobase
ffffffff802a38b6 (W) sys_pciconfig_read
ffffffff802a38b6 (W) sys_pciconfig_write
ffffffff802a38b6 (W) sys_spu_create
ffffffff802a38b6 (W) sys_spu_run
ffffffff802a38b6 (W) sys_vm86
ffffffff802a38b6 (W) sys_vm86old
crash>
- Depending upon the kernel, one of those symbols would be displayed
instead of sys_ni_syscall. (olivier.daudel(a)u-paris10.fr)
- Fix for "sig" command where in later 2.6 kernels, the queued signal
list at the end of the display would loop back on itself, repeatedly
displaying the same queued signal(s). (olivier.daudel(a)u-paris10.fr)
Download from: http://people.redhat.com/anderson