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Merge "llkd: check stack for wait_on_page_bit_killable"

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Treehugger Robot 2019-01-04 21:55:15 +00:00 • committed by Gerrit Code Review
commit b815e6ccd4
2 changed files with 5 additions and 3 deletions
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5
llkd/README.md
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@ -135,8 +135,9 @@ Only active on userdebug or eng builds.
default 2 minutes samples of threads for D or Z.
#### ro.llk.stack
default cma_alloc,__get_user_pages,bit_wait_io comma separated list of kernel
symbols. The string "*false*" is the equivalent to an *empty* list.
default cma_alloc,__get_user_pages,bit_wait_io,wait_on_page_bit_killable
comma separated list of kernel symbols.
The string "*false*" is the equivalent to an *empty* list.
Look for kernel stack symbols that if ever persistently present can
indicate a subsystem is locked up.
Beware, check does not on purpose do forward scheduling ABA except by polling

3
llkd/include/llkd.h
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@ -50,7 +50,8 @@ unsigned llkCheckMilliseconds(void);
/* LLK_CHECK_MS_DEFAULT = actual timeout_ms / LLK_CHECKS_PER_TIMEOUT_DEFAULT */
#define LLK_CHECKS_PER_TIMEOUT_DEFAULT 5
#define LLK_CHECK_STACK_PROPERTY "ro.llk.stack"
#define LLK_CHECK_STACK_DEFAULT "cma_alloc,__get_user_pages,bit_wait_io"
#define LLK_CHECK_STACK_DEFAULT \
"cma_alloc,__get_user_pages,bit_wait_io,wait_on_page_bit_killable"
#define LLK_BLACKLIST_PROCESS_PROPERTY "ro.llk.blacklist.process"
#define LLK_BLACKLIST_PROCESS_DEFAULT \
"0,1,2,init,[kthreadd],[khungtaskd],lmkd,llkd,watchdogd,[watchdogd],[watchdogd/0]"