diff options
| author | Jason Xing <kernelxing@tencent.com> | 2025-06-12 14:11:57 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-09 22:57:51 -0700 |
| commit | 2489e958129ff7cbf26a34ee33cdc9ccbd68fe3c (patch) | |
| tree | a36e1e6b43ecad6ce55a8658f77c34376b527cb7 /drivers | |
| parent | c9e3fb050e9cb0d3a833b2c62b35ea42cdd81e89 (diff) | |
relayfs: abolish prev_padding
Patch series "relayfs: misc changes", v5.
The series mostly focuses on the error counters which helps every user
debug their own kernel module.
This patch (of 5):
prev_padding represents the unused space of certain subbuffer. If the
content of a call of relay_write() exceeds the limit of the remainder of
this subbuffer, it will skip storing in the rest space and record the
start point as buf->prev_padding in relay_switch_subbuf(). Since the buf
is a per-cpu big buffer, the point of prev_padding as a global value for
the whole buffer instead of a single subbuffer (whose padding info is
stored in buf->padding[]) seems meaningless from the real use cases, so we
don't bother to record it any more.
Link: https://lkml.kernel.org/r/20250612061201.34272-1-kerneljasonxing@gmail.com
Link: https://lkml.kernel.org/r/20250612061201.34272-2-kerneljasonxing@gmail.com
Signed-off-by: Jason Xing <kernelxing@tencent.com>
Reviewed-by: Yushan Zhou <katrinzhou@tencent.com>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/uc/intel_guc_log.c | 3 | ||||
| -rw-r--r-- | drivers/net/wwan/iosm/iosm_ipc_trace.c | 3 | ||||
| -rw-r--r-- | drivers/net/wwan/t7xx/t7xx_port_trace.c | 2 |
3 files changed, 3 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c index e8a04e476c57..09a64f224c49 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c @@ -220,8 +220,7 @@ static int guc_action_control_log(struct intel_guc *guc, bool enable, */ static int subbuf_start_callback(struct rchan_buf *buf, void *subbuf, - void *prev_subbuf, - size_t prev_padding) + void *prev_subbuf) { /* * Use no-overwrite mode by default, where relay will stop accepting diff --git a/drivers/net/wwan/iosm/iosm_ipc_trace.c b/drivers/net/wwan/iosm/iosm_ipc_trace.c index eeecfa3d10c5..9656254c1c6c 100644 --- a/drivers/net/wwan/iosm/iosm_ipc_trace.c +++ b/drivers/net/wwan/iosm/iosm_ipc_trace.c @@ -51,8 +51,7 @@ static int ipc_trace_remove_buf_file_handler(struct dentry *dentry) } static int ipc_trace_subbuf_start_handler(struct rchan_buf *buf, void *subbuf, - void *prev_subbuf, - size_t prev_padding) + void *prev_subbuf) { if (relay_buf_full(buf)) { pr_err_ratelimited("Relay_buf full dropping traces"); diff --git a/drivers/net/wwan/t7xx/t7xx_port_trace.c b/drivers/net/wwan/t7xx/t7xx_port_trace.c index 4ed8b4e29bf1..f16d3b01302c 100644 --- a/drivers/net/wwan/t7xx/t7xx_port_trace.c +++ b/drivers/net/wwan/t7xx/t7xx_port_trace.c @@ -33,7 +33,7 @@ static int t7xx_trace_remove_buf_file_handler(struct dentry *dentry) } static int t7xx_trace_subbuf_start_handler(struct rchan_buf *buf, void *subbuf, - void *prev_subbuf, size_t prev_padding) + void *prev_subbuf) { if (relay_buf_full(buf)) { pr_err_ratelimited("Relay_buf full dropping traces"); |