Alexander Shishkin 26ae4f4406 perf/ring_buffer: Fix AUX software double buffering ... This recent commit: 5768402fd9 ("perf/ring_buffer: Use high order allocations for AUX buffers optimistically") overlooked the fact that the previous one page granularity of the AUX buffer provided an implicit double buffering capability to the PMU driver, which went away when the entire buffer became one high-order page. Always make the full-trace mode AUX allocation at least two-part to preserve the previous behavior and allow the implicit double buffering to continue. Reported-by: Ammy Yi <ammy.yi@intel.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: adrian.hunter@intel.com Fixes: 5768402fd9 ("perf/ring_buffer: Use high order allocations for AUX buffers optimistically") Link: http://lkml.kernel.org/r/20190503085536.24119-2-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2019-05-03 12:46:10 +02:00
..
callchain.c	perf/core: Convert to SPDX license identifiers	2019-02-04 08:46:11 +01:00
core.c	perf/core: Fix the address filtering fix	2019-04-16 12:13:57 +02:00
hw_breakpoint.c	perf/hw_breakpoints: Convert to SPDX license identifier	2019-02-04 08:46:13 +01:00
internal.h	perf/ring_buffer: Convert ring_buffer.aux_refcount to refcount_t	2019-02-04 08:46:17 +01:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ring_buffer.c	perf/ring_buffer: Fix AUX software double buffering	2019-05-03 12:46:10 +02:00
uprobes.c	The biggest change for this release is in the histogram code.	2019-03-11 17:01:32 -07:00