Compressed Dump

Compressed Dump White Paper, Version 1.3

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index into an array of error messages. The error message strings

are deﬁned in CCERR_STRINGS (see below).

> 0 Warning, The corresponding device has been conﬁgured but

there is one or more notes or warnings associated with the

device. The returned value is a bitmap of warnings. the warning

message strings are deﬁned in CCWARN_STRINGS (see

below).

Any parameters which are not used for the given operation should be set to zero.

Note that both devices and deviceReturn must be speciﬁed if DC_DEVICES is

speciﬁed.

Classes

The following system memory classes have been deﬁned as of this writing. Refer to

the output of crashconf(1M) or to /usr/include/sys/crashconf.h for deﬁnitions of any

classes added since publication. The memory page size is 4Kb.

DT_UNUSED Unused physical memory pages

DT_KCODE Kernel code pages

DT_BCACHE Buffer cache data pages

DT_KSDATA Kernel static data pages

DT_KDDATA Kernel dynamic data pages

DT_FSDATA File system metadata pages

DT_USTACK User process stack pages

DT_SUPERPG Unused super page pool pages

DT_USERPG User process pages

EXAMPLES

The following examples demonstrate the usage of crashconf().

Example 1: Adding a Crash Dump Device

char *device_to_add[1];

int device_return[1];

...

crashconf(DC_DEVICES, 0, 0, 1, device_to_add,device_return);

Example 2: Force Dumping of Buffer Cache

crashconf(DC_INCLUDE, DT_BCACHE, 0, 0, NULL, NULL);

Example 3: Disable Dumps

crashconf(DC_EXCLUDE | DC_REPLACE, 0, DT_ALL,

0, NULL, NULL);