From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Stultz Subject: [PATCH 19/30] staging: sync: Dump sync state to console on timeout Date: Thu, 28 Feb 2013 16:43:15 -0800 Message-ID: <1362098606-26469-20-git-send-email-john.stultz@linaro.org> References: <1362098606-26469-1-git-send-email-john.stultz@linaro.org> Return-path: In-Reply-To: <1362098606-26469-1-git-send-email-john.stultz@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: lkml Cc: Erik Gilling , Maarten Lankhorst , Daniel Vetter , Rob Clark , Sumit Semwal , Greg KH , dri-devel@lists.freedesktop.org, Android Kernel Team , John Stultz List-Id: dri-devel@lists.freedesktop.org From: Erik Gilling If we hit a timeout, dump sync state to console Cc: Maarten Lankhorst Cc: Erik Gilling Cc: Daniel Vetter Cc: Rob Clark Cc: Sumit Semwal Cc: Greg KH Cc: dri-devel@lists.freedesktop.org Cc: Android Kernel Team Signed-off-by: Erik Gilling [jstultz: Add commit message, whitespace fixups] Signed-off-by: John Stultz --- drivers/staging/android/sync.c | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c index 7fccfcd..d54fa8d 100644 --- a/drivers/staging/android/sync.c +++ b/drivers/staging/android/sync.c @@ -31,6 +31,7 @@ static void sync_fence_signal_pt(struct sync_pt *pt); static int _sync_pt_has_signaled(struct sync_pt *pt); static void sync_fence_free(struct kref *kref); +static void sync_dump(void); static LIST_HEAD(sync_timeline_list_head); static DEFINE_SPINLOCK(sync_timeline_list_lock); @@ -574,8 +575,10 @@ int sync_fence_wait(struct sync_fence *fence, long timeout) if (fence->status < 0) return fence->status; - if (fence->status == 0) + if (fence->status == 0) { + sync_dump(); return -ETIME; + } return 0; } @@ -914,7 +917,34 @@ static __init int sync_debugfs_init(void) debugfs_create_file("sync", S_IRUGO, NULL, NULL, &sync_debugfs_fops); return 0; } - late_initcall(sync_debugfs_init); +#define DUMP_CHUNK 256 +static char sync_dump_buf[64 * 1024]; +void sync_dump(void) +{ + struct seq_file s = { + .buf = sync_dump_buf, + .size = sizeof(sync_dump_buf) - 1, + }; + int i; + + sync_debugfs_show(&s, NULL); + + for (i = 0; i < s.count; i += DUMP_CHUNK) { + if ((s.count - i) > DUMP_CHUNK) { + char c = s.buf[i + DUMP_CHUNK]; + s.buf[i + DUMP_CHUNK] = 0; + pr_cont("%s", s.buf + i); + s.buf[i + DUMP_CHUNK] = c; + } else { + s.buf[s.count] = 0; + pr_cont("%s", s.buf + i); + } + } +} +#else +static void sync_dump(void) +{ +} #endif -- 1.7.10.4