diff options
| author | Harry Yoo (Oracle) <harry@kernel.org> | 2026-07-13 23:28:51 +0900 |
|---|---|---|
| committer | Vlastimil Babka (SUSE) <vbabka@kernel.org> | 2026-07-14 16:44:40 +0200 |
| commit | a37b0066a10aabf3c968b4566706fb866eaf9a85 (patch) | |
| tree | aa0e130cd99d08974d985fcd41a0318f679d5bb9 /lib | |
| parent | 982e31382d9a1a3c8c4e6a13702a53711f4efe9f (diff) | |
lib/alloc_tag: introduce mem_alloc_profiling_permanently_disabled()
mem_alloc_profiling_enabled() tells whether memalloc profiling is
currently enabled. However, even when this function returns false,
it can be enabled later.
However, this is not enough. Some optimizations can be applied only when
memalloc profiling is permanently disabled. For example, to skip the
creation of KMALLOC_NO_OBJ_EXT caches at boot time, mem_profiling must
be set to "never", "0" w/ debugging on, or have been shutdown so that
it can no longer be enabled.
Introduce mem_alloc_profiling_permanently_disabled() for this purpose.
Signed-off-by: Harry Yoo (Oracle) <harry@kernel.org>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Link: https://patch.msgid.link/20260713-kmalloc-no-objext-v3-3-47c7bd138de7@kernel.org
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/alloc_tag.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/alloc_tag.c b/lib/alloc_tag.c index d9be1cf5187d..e5b218176c5a 100644 --- a/lib/alloc_tag.c +++ b/lib/alloc_tag.c @@ -26,6 +26,15 @@ static bool mem_profiling_support = true; static bool mem_profiling_support; #endif +/* + * Memory allocation profiling is permanently disabled and cannot be enabled. + * Must be called after setup_early_mem_profiling(). + */ +bool mem_alloc_profiling_permanently_disabled(void) +{ + return !mem_profiling_support; +} + static struct codetag_type *alloc_tag_cttype; #ifdef CONFIG_ARCH_MODULE_NEEDS_WEAK_PER_CPU |