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| author | levi.yun <yeoreum.yun@arm.com> | 2024-07-04 16:02:26 +0100 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-07-15 15:07:14 -0400 |
| commit | 7dc836187f7c6f70a82b4521503e9f9f96194581 (patch) | |
| tree | 09b4350049d0ea5417de56a7eca7c0927d0d9b99 /kernel | |
| parent | a325742505f6f08141fd7a530a82a907780bfd2c (diff) | |
| download | lwn-7dc836187f7c6f70a82b4521503e9f9f96194581.tar.gz lwn-7dc836187f7c6f70a82b4521503e9f9f96194581.zip | |
trace/pid_list: Change gfp flags in pid_list_fill_irq()
pid_list_fill_irq() runs via irq_work.
When CONFIG_PREEMPT_RT is disabled, it would run in irq_context.
so it shouldn't sleep while memory allocation.
Change gfp flags from GFP_KERNEL to GFP_NOWAIT to prevent sleep in
irq_work.
This change wouldn't impact functionality in practice because the worst-size
is 2K.
Cc: stable@goodmis.org
Fixes: 8d6e90983ade2 ("tracing: Create a sparse bitmask for pid filtering")
Link: https://lore.kernel.org/20240704150226.1359936-1-yeoreum.yun@arm.com
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: levi.yun <yeoreum.yun@arm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/pid_list.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/pid_list.c b/kernel/trace/pid_list.c index 19b271a12c99..4966e6bbdf6f 100644 --- a/kernel/trace/pid_list.c +++ b/kernel/trace/pid_list.c @@ -354,7 +354,7 @@ static void pid_list_refill_irq(struct irq_work *iwork) while (upper_count-- > 0) { union upper_chunk *chunk; - chunk = kzalloc(sizeof(*chunk), GFP_KERNEL); + chunk = kzalloc(sizeof(*chunk), GFP_NOWAIT); if (!chunk) break; *upper_next = chunk; @@ -365,7 +365,7 @@ static void pid_list_refill_irq(struct irq_work *iwork) while (lower_count-- > 0) { union lower_chunk *chunk; - chunk = kzalloc(sizeof(*chunk), GFP_KERNEL); + chunk = kzalloc(sizeof(*chunk), GFP_NOWAIT); if (!chunk) break; *lower_next = chunk; |