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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2025-12-13 01:18:20 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2025-12-13 01:18:20 -0800 |
| commit | a4a508df2aa34f8650afde54ea804321c618f45f (patch) | |
| tree | f75f10e7c54f991d7d859f8cbdcc8bcaed5bbd6f /kernel/trace/ring_buffer.c | |
| parent | c4b3133c6a2fc283cb3d34c64d40ed2fa254b608 (diff) | |
| parent | 7d0a66e4bb9081d75c82ec4957c50034cb0ea449 (diff) | |
| download | linux-a4a508df2aa34f8650afde54ea804321c618f45f.tar.gz linux-a4a508df2aa34f8650afde54ea804321c618f45f.zip | |
Merge tag 'v6.18' into next
Sync up with the mainline to bring in the latest APIs.
Diffstat (limited to 'kernel/trace/ring_buffer.c')
| -rw-r--r-- | kernel/trace/ring_buffer.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index bb71a0dc9d69..afcd3747264d 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -7273,7 +7273,7 @@ int ring_buffer_map(struct trace_buffer *buffer, int cpu, atomic_dec(&cpu_buffer->resize_disabled); } - return 0; + return err; } int ring_buffer_unmap(struct trace_buffer *buffer, int cpu) @@ -7344,6 +7344,10 @@ consume: goto out; } + /* Did the reader catch up with the writer? */ + if (cpu_buffer->reader_page == cpu_buffer->commit_page) + goto out; + reader = rb_get_reader_page(cpu_buffer); if (WARN_ON(!reader)) goto out; @@ -7666,7 +7670,7 @@ static __init int test_ringbuffer(void) rb_test_started = true; set_current_state(TASK_INTERRUPTIBLE); - /* Just run for 10 seconds */; + /* Just run for 10 seconds */ schedule_timeout(10 * HZ); kthread_stop(rb_hammer); |