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| author | Wang YanQing <udknight@gmail.com> | 2014-04-03 14:50:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-03 16:21:27 -0700 |
| commit | 4762c98413836dfc3bff2857647f8d673a86d210 (patch) | |
| tree | 5f34e7f47b3a0224583d126f6f44b8a30fae9102 /Documentation/kmemleak.txt | |
| parent | 31e143686a39bff19a72d1806f9b8392c03dca92 (diff) | |
| download | lwn-4762c98413836dfc3bff2857647f8d673a86d210.tar.gz lwn-4762c98413836dfc3bff2857647f8d673a86d210.zip | |
Documentation/kmemleak.txt: updates
Update Documentatin/kmemleak.txt to reflect the following changes:
Commit b69ec42b1b19 ("Kconfig: clean up the long arch list for the
DEBUG_KMEMLEAK config option") made it so that we can't check supported
architectures by read Kconfig.debug.
Commit 85d3a316c71 ("kmemleak: use rbtree instead of prio tree")
converted kmemleak to use rbtree instead of prio tree.
Signed-off-by: Wang YanQing <udknight@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/kmemleak.txt')
| -rw-r--r-- | Documentation/kmemleak.txt | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/Documentation/kmemleak.txt b/Documentation/kmemleak.txt index 6c18be97f3dd..a7563ec4ea7b 100644 --- a/Documentation/kmemleak.txt +++ b/Documentation/kmemleak.txt @@ -11,9 +11,7 @@ with the difference that the orphan objects are not freed but only reported via /sys/kernel/debug/kmemleak. A similar method is used by the Valgrind tool (memcheck --leak-check) to detect the memory leaks in user-space applications. - -Please check DEBUG_KMEMLEAK dependencies in lib/Kconfig.debug for supported -architectures. +Kmemleak is supported on x86, arm, powerpc, sparc, sh, microblaze, ppc, mips, s390, metag and tile. Usage ----- @@ -69,7 +67,7 @@ Basic Algorithm The memory allocations via kmalloc, vmalloc, kmem_cache_alloc and friends are traced and the pointers, together with additional -information like size and stack trace, are stored in a prio search tree. +information like size and stack trace, are stored in a rbtree. The corresponding freeing function calls are tracked and the pointers removed from the kmemleak data structures. @@ -85,7 +83,7 @@ The scanning algorithm steps: 1. mark all objects as white (remaining white objects will later be considered orphan) 2. scan the memory starting with the data section and stacks, checking - the values against the addresses stored in the prio search tree. If + the values against the addresses stored in the rbtree. If a pointer to a white object is found, the object is added to the gray list 3. scan the gray objects for matching addresses (some white objects |