Vaibhav Nagarnaik 83f365554e ring-buffer: Allow for rescheduling when removing pages ... When reducing ring buffer size, pages are removed by scheduling a work item on each CPU for the corresponding CPU ring buffer. After the pages are removed from ring buffer linked list, the pages are free()d in a tight loop. The loop does not give up CPU until all pages are removed. In a worst case behavior, when lot of pages are to be freed, it can cause system stall. After the pages are removed from the list, the free() can happen while the work is rescheduled. Call cond_resched() in the loop to prevent the system hangup. Link: http://lkml.kernel.org/r/20180907223129.71994-1-vnagarnaik@google.com Cc: stable@vger.kernel.org Fixes: 83f40318da ("ring-buffer: Make removal of ring buffer pages atomic") Reported-by: Jason Behmer <jbehmer@google.com> Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@google.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2018-09-17 18:15:11 -04:00
..
Kconfig	Masami found an off by one bug in the code that keeps "notrace" functions	2018-08-23 13:07:00 -07:00
Makefile	tracing: Allow gcov profiling on only ftrace subsystem	2018-08-21 09:11:49 -04:00
blktrace.c	for-4.19/post-20180822	2018-08-22 13:38:05 -07:00
bpf_trace.c	tracing: Add SPDX License format to bpf_trace.c	2018-08-16 19:07:36 -04:00
ftrace.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
power-traces.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
preemptirq_delay_test.c	tracing: preemptirq_delay_run() can be static	2018-07-27 17:58:34 -04:00
ring_buffer.c	ring-buffer: Allow for rescheduling when removing pages	2018-09-17 18:15:11 -04:00
ring_buffer_benchmark.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
rpm-traces.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace.c	Updates for v4.19:	2018-08-20 18:32:00 -07:00
trace.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_benchmark.c	rcu: Rename cond_resched_rcu_qs() to cond_resched_tasks_rcu_qs()	2018-05-15 10:27:29 -07:00
trace_benchmark.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_branch.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_clock.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_entries.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_event_perf.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_events.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_events_filter.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_events_filter_test.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_events_hist.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_events_trigger.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_export.c	tracing: Add trigger file for trace_markers tracefs/ftrace/print	2018-05-29 08:28:53 -04:00
trace_functions.c	tracing: Update stack trace skipping for ORC unwinder	2018-01-23 15:57:00 -05:00
trace_functions_graph.c	tracing: Fix missing return symbol in function_graph output	2018-07-03 18:47:11 -04:00
trace_hwlat.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_irqsoff.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_kdb.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_kprobe.c	Masami found an off by one bug in the code that keeps "notrace" functions	2018-08-23 13:07:00 -07:00
trace_kprobe_selftest.c	selftest/ftrace: Move kprobe selftest function to separate compile unit	2018-07-30 18:41:04 -04:00
trace_kprobe_selftest.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_mmiotrace.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_nop.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_output.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_output.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_preemptirq.c	tracing: More reverting of "tracing: Centralize preemptirq tracepoints and unify their usage"	2018-08-10 15:12:00 -04:00
trace_printk.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_probe.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_probe.h	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_sched_switch.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_sched_wakeup.c	Merge branch 'linus' into sched/core, to pick up fixes	2017-11-08 10:17:15 +01:00
trace_selftest.c	Tracing updates for 4.15:	2017-11-17 14:58:01 -08:00
trace_selftest_dynamic.c	ftrace: Mark function tracer test functions noinline/noclone	2018-01-23 15:57:29 -05:00
trace_seq.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
trace_stack.c	tracing: Fix the file mode of stack tracer	2018-05-03 11:58:05 -04:00
trace_stat.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_stat.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00
trace_syscalls.c	Tracing updates for 4.15:	2017-11-17 14:58:01 -08:00
trace_uprobe.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
tracing_map.c	tracing: Add SPDX License format tags to tracing files	2018-08-16 19:08:06 -04:00
tracing_map.h	tracing: Fix SPDX format headers to use C++ style comments	2018-08-16 19:08:06 -04:00