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| author |  Jakub Kicinski <kuba@kernel.org>
| 2024-01-04 18:04:58 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org>
| 2024-01-04 18:06:46 -0800 |
| commit | e63c1822ac32a865dd02a18107fc933fd7b30f6f (patch) | |
| tree | 3d3875012e8412080a5ecc5f71d8f7e849bd4a95 /kernel/trace/trace.c | |
| parent | Merge tag 'wireless-next-2024-01-03' of git://git.kernel.org/pub/scm/linux/ke... (diff) | |
| parent | Merge tag 'net-6.7-rc9' of git://git.kernel.org/pub/scm/linux/kernel/git/netd... (diff) | |
| download | linux-e63c1822ac32a865dd02a18107fc933fd7b30f6f.tar.gz linux-e63c1822ac32a865dd02a18107fc933fd7b30f6f.tar.bz2 linux-e63c1822ac32a865dd02a18107fc933fd7b30f6f.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR.
Conflicts:
drivers/net/ethernet/broadcom/bnxt/bnxt.c
e009b2efb7a8 ("bnxt_en: Remove mis-applied code from bnxt_cfg_ntp_filters()")
0f2b21477988 ("bnxt_en: Fix compile error without CONFIG_RFS_ACCEL")
https://lore.kernel.org/all/20240105115509.225aa8a2@canb.auug.org.au/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 199df497db07..a0defe156b57 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1894,6 +1894,9 @@ update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu, __update_max_tr(tr, tsk, cpu); arch_spin_unlock(&tr->max_lock); + + /* Any waiters on the old snapshot buffer need to wake up */ + ring_buffer_wake_waiters(tr->array_buffer.buffer, RING_BUFFER_ALL_CPUS); } /** @@ -1945,12 +1948,23 @@ update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu) static int wait_on_pipe(struct trace_iterator *iter, int full) { + int ret; + /* Iterators are static, they should be filled or empty */ if (trace_buffer_iter(iter, iter->cpu_file)) return 0; - return ring_buffer_wait(iter->array_buffer->buffer, iter->cpu_file, - full); + ret = ring_buffer_wait(iter->array_buffer->buffer, iter->cpu_file, full); + +#ifdef CONFIG_TRACER_MAX_TRACE + /* + * Make sure this is still the snapshot buffer, as if a snapshot were + * to happen, this would now be the main buffer. + */ + if (iter->snapshot) + iter->array_buffer = &iter->tr->max_buffer; +#endif + return ret; } #ifdef CONFIG_FTRACE_STARTUP_TEST @@ -8517,7 +8531,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, wait_index = READ_ONCE(iter->wait_index); - ret = wait_on_pipe(iter, iter->tr->buffer_percent); + ret = wait_on_pipe(iter, iter->snapshot ? 0 : iter->tr->buffer_percent); if (ret) goto out; |