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| author | Chuck Lever <chuck.lever@oracle.com> | 2021-10-04 17:16:26 +0300 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2021-10-04 22:40:15 +0300 |
| commit | 22a027e8c03f9a7794d16daa3b4b117ac6d340c3 (patch) | |
| tree | d01c749279ec39f2b944d1a167293a490f9840a4 | |
| parent | 45f135846815ef787b41767ad3823194de5ccfdf (diff) | |
| download | linux-22a027e8c03f9a7794d16daa3b4b117ac6d340c3.tar.xz | |
SUNRPC: Add trace event when alloc_pages_bulk() makes no progress
This is an operational low memory situation that needs to be
flagged. The new tracepoint records a timestamp and the nfsd thread
that failed to allocate pages.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | include/trace/events/sunrpc.h | 18 | ||||
| -rw-r--r-- | net/sunrpc/svc_xprt.c | 1 |
2 files changed, 19 insertions, 0 deletions
diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h index 2d04eb96d418..fb016308c185 100644 --- a/include/trace/events/sunrpc.h +++ b/include/trace/events/sunrpc.h @@ -1859,6 +1859,24 @@ TRACE_EVENT(svc_wake_up, TP_printk("pid=%d", __entry->pid) ); +TRACE_EVENT(svc_alloc_arg_err, + TP_PROTO( + unsigned int pages + ), + + TP_ARGS(pages), + + TP_STRUCT__entry( + __field(unsigned int, pages) + ), + + TP_fast_assign( + __entry->pages = pages; + ), + + TP_printk("pages=%u", __entry->pages) +); + TRACE_EVENT(svc_handle_xprt, TP_PROTO(struct svc_xprt *xprt, int len), diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 6316bd2b8f37..1e99ba1b9d72 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -687,6 +687,7 @@ static int svc_alloc_arg(struct svc_rqst *rqstp) set_current_state(TASK_RUNNING); return -EINTR; } + trace_svc_alloc_arg_err(pages); schedule_timeout(msecs_to_jiffies(500)); } rqstp->rq_page_end = &rqstp->rq_pages[pages]; |