imrcpan/erofs-linux
1
0 Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git synced 2026-10-30 22:03:17 +01:00
Code Issues Packages Projects Releases Wiki Activity

ring-buffer: Do not disable recording when there is an iterator

Browse Source 
Now that the iterator can handle a concurrent writer, do not disable writing
to the ring buffer when there is an iterator present.

Link: http://lkml.kernel.org/r/[email protected]

Signed-off-by: Steven Rostedt (VMware) <[email protected]>
This commit is contained in:
Steven Rostedt (VMware) committed 2020-03-27 16:38:58 -04:00
1 parent 07b8b10ec9
commit 1039221cc2
1 file changed
-2
Download Patch File Download Diff File Expand all files Collapse all files
kernel/trace/ring_buffer.c
-2
View File
@@ -4312,7 +4312,6 @@ ring_buffer_read_prepare(struct trace_buffer *buffer, int cpu, gfp_t flags)
iter->cpu_buffer = cpu_buffer;
atomic_inc(&cpu_buffer->resize_disabled);
atomic_inc(&cpu_buffer->record_disabled);
return iter;
}
@@ -4385,7 +4384,6 @@ ring_buffer_read_finish(struct ring_buffer_iter *iter)
rb_check_pages(cpu_buffer);
raw_spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
atomic_dec(&cpu_buffer->record_disabled);
atomic_dec(&cpu_buffer->resize_disabled);
kfree(iter->event);
kfree(iter);