Steven Rostedt (Google) fa8f4a8973 ring-buffer: Allow splice to read previous partially read pages ... If a page is partially read, and then the splice system call is run against the ring buffer, it will always fail to read, no matter how much is in the ring buffer. That's because the code path for a partial read of the page does will fail if the "full" flag is set. The splice system call wants full pages, so if the read of the ring buffer is not yet full, it should return zero, and the splice will block. But if a previous read was done, where the beginning has been consumed, it should still be given to the splice caller if the rest of the page has been written to. This caused the splice command to never consume data in this scenario, and let the ring buffer just fill up and lose events. Link: https://lkml.kernel.org/r/20220927144317.46be6b80@gandalf.local.home Cc: stable@vger.kernel.org Fixes: 8789a9e7df ("ring-buffer: read page interface") Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>		2022-09-27 14:48:27 -04:00
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rv	rv/monitor: Add __init/__exit annotations to module init/exit funcs	2022-09-26 18:10:51 -04:00
blktrace.c	blktrace: Fix the blk_fill_rwbs() kernel-doc header	2022-07-15 13:10:04 -06:00
bpf_trace.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2022-06-23 12:33:24 -07:00
bpf_trace.h
error_report-traces.c
fgraph.c	arm64 fixes for 5.19-rc1:	2022-06-03 14:05:34 -07:00
fprobe.c	fprobe: Resolve symbols with ftrace_lookup_symbols	2022-05-10 14:42:06 -07:00
ftrace_internal.h
ftrace.c	ftrace: Fix recursive locking direct_mutex in ftrace_modify_direct_caller	2022-09-27 14:48:27 -04:00
Kconfig	rv: Add Runtime Verification (RV) interface	2022-07-30 14:01:28 -04:00
kprobe_event_gen_test.c	tracing: kprobe: Make gen test module work in arm and riscv	2022-09-26 16:04:47 -04:00
Makefile	rv: Add Runtime Verification (RV) interface	2022-07-30 14:01:28 -04:00
pid_list.c	tracing: Cleanup double word in comment	2022-04-26 17:58:50 -04:00
pid_list.h	tracing: Create a sparse bitmask for pid filtering	2021-10-05 17:38:45 -04:00
power-traces.c
preemptirq_delay_test.c
rethook.c	rethook: Reject getting a rethook if RCU is not watching	2022-06-17 21:53:35 +02:00
ring_buffer_benchmark.c
ring_buffer.c	ring-buffer: Allow splice to read previous partially read pages	2022-09-27 14:48:27 -04:00
rpm-traces.c
synth_event_gen_test.c
trace_benchmark.c	tracing: Add numeric delta time to the trace event benchmark	2022-09-26 13:01:09 -04:00
trace_benchmark.h	tracing: Add numeric delta time to the trace event benchmark	2022-09-26 13:01:09 -04:00
trace_boot.c	tracing: Initialize integer variable to prevent garbage return value	2022-05-26 21:13:00 -04:00
trace_branch.c
trace_clock.c
trace_dynevent.c	tracing: Auto generate event name when creating a group of events	2022-07-24 19:11:17 -04:00
trace_dynevent.h
trace_entries.h
trace_eprobe.c	tracing/eprobe: Fix alloc event dir failed when event name no set	2022-09-27 14:48:26 -04:00
trace_event_perf.c	tracing/perf: Fix double put of trace event when init fails	2022-08-21 15:56:07 -04:00
trace_events_filter_test.h
trace_events_filter.c	tracing/filter: Call filter predicate functions directly via a switch statement	2022-09-26 13:01:10 -04:00
trace_events_hist.c	tracing/hist: Call hist functions directly via a switch statement	2022-09-26 13:01:10 -04:00
trace_events_inject.c	tracing: Support __rel_loc relative dynamic data location attribute	2021-12-06 15:37:21 -05:00
trace_events_synth.c	tracing: Fix strncpy warning in trace_events_synth.c	2022-03-11 11:49:24 -05:00
trace_events_trigger.c	tracing: Fix to check event_mutex is held while accessing trigger list	2022-09-06 22:26:00 -04:00
trace_events_user.c	tracing/user_events: Fix syntax errors in comments	2022-07-12 17:35:11 -04:00
trace_events.c	tracing: Have filter accept "common_cpu" to be consistent	2022-08-21 15:56:08 -04:00
trace_export.c
trace_functions_graph.c	tracing: in_irq() cleanup	2021-10-13 18:19:41 -04:00
trace_functions.c	ftrace: disable preemption when recursion locked	2021-10-27 11:21:49 -04:00
trace_hwlat.c	trace/hwlat: make use of the helper function kthread_run_on_cpu()	2022-01-15 16:30:24 +02:00
trace_irqsoff.c
trace_kdb.c
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_kprobe.c	tracing: Auto generate event name when creating a group of events	2022-07-24 19:11:17 -04:00
trace_mmiotrace.c
trace_nop.c
trace_osnoise.c	tracing/osnoise: Fix possible recursive locking in stop_per_cpu_kthreads	2022-09-26 16:05:18 -04:00
trace_output.c	tracing: Remove usage of list iterator after the loop body	2022-04-27 17:19:30 -04:00
trace_output.h
trace_preemptirq.c	tracing: hold caller_addr to hardirq_{enable,disable}_ip	2022-09-06 22:26:00 -04:00
trace_printk.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_probe_tmpl.h
trace_probe.c	tracing/probes: Have kprobes and uprobes use $COMM too	2022-08-21 15:56:08 -04:00
trace_probe.h	tracing/eprobe: Add eprobe filter support	2022-09-26 13:01:08 -04:00
trace_recursion_record.c	tracing: Use trace_create_file() to simplify creation of tracefs entries	2022-05-26 21:12:52 -04:00
trace_sched_switch.c	sched/tracing: Append prev_state to tp args instead	2022-05-12 00:37:11 +02:00
trace_sched_wakeup.c	sched/tracing: Append prev_state to tp args instead	2022-05-12 00:37:11 +02:00
trace_selftest_dynamic.c
trace_selftest.c	tracing: Reset the function filter after completing trampoline/graph selftest	2022-05-25 16:57:37 -04:00
trace_seq.c
trace_stack.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_stat.c	tracing: Disable "other" permission bits in the tracefs files	2021-10-08 18:08:43 -04:00
trace_stat.h
trace_synth.h
trace_syscalls.c	tracing: Make tp_printk work on syscall tracepoints	2022-04-26 17:58:52 -04:00
trace_uprobe.c	Tracing updates for 5.20 / 6.0	2022-08-05 09:41:12 -07:00
trace.c	tracing: Disable interrupt or preemption before acquiring arch_spinlock_t	2022-09-27 14:48:11 -04:00
trace.h	tracing: Move struct filter_pred into trace_events_filter.c	2022-09-26 13:01:10 -04:00
tracing_map.c	tracing: Fix tracing_map_sort_entries() kernel-doc comment	2022-04-26 17:58:51 -04:00
tracing_map.h