From: Stefan Roesch <[email protected]>
To: <[email protected]>, <[email protected]>,
<[email protected]>, <[email protected]>,
<[email protected]>
Cc: <[email protected]>, <[email protected]>, <[email protected]>
Subject: [RFC PATCH v2 15/16] io_uring: add tracepoint for short writes
Date: Mon, 16 May 2022 09:47:17 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
This adds the io_uring_short_write tracepoint to io_uring. A short write
is issued if not all pages that are required for a write are in the page
cache and the async buffered writes have to return EAGAIN.
Signed-off-by: Stefan Roesch <[email protected]>
---
fs/io_uring.c | 3 +++
include/trace/events/io_uring.h | 25 +++++++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index f3aaac286509..7435a9c2007f 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4032,6 +4032,9 @@ static int io_write(struct io_kiocb *req, unsigned int issue_flags)
if (ret2 != req->result && ret2 >= 0 && need_complete_io(req)) {
struct io_async_rw *rw;
+ trace_io_uring_short_write(req->ctx, kiocb->ki_pos - ret2,
+ req->result, ret2);
+
/* This is a partial write. The file pos has already been
* updated, setup the async struct to complete the request
* in the worker. Also update bytes_done to account for
diff --git a/include/trace/events/io_uring.h b/include/trace/events/io_uring.h
index cddf5b6fbeb4..661834361d33 100644
--- a/include/trace/events/io_uring.h
+++ b/include/trace/events/io_uring.h
@@ -543,6 +543,31 @@ TRACE_EVENT(io_uring_req_failed,
(unsigned long long) __entry->pad2, __entry->error)
);
+TRACE_EVENT(io_uring_short_write,
+
+ TP_PROTO(void *ctx, u64 fpos, u64 wanted, u64 got),
+
+ TP_ARGS(ctx, fpos, wanted, got),
+
+ TP_STRUCT__entry(
+ __field(void *, ctx)
+ __field(u64, fpos)
+ __field(u64, wanted)
+ __field(u64, got)
+ ),
+
+ TP_fast_assign(
+ __entry->ctx = ctx;
+ __entry->fpos = fpos;
+ __entry->wanted = wanted;
+ __entry->got = got;
+ ),
+
+ TP_printk("ring %p, fpos %lld, wanted %lld, got %lld",
+ __entry->ctx, __entry->fpos,
+ __entry->wanted, __entry->got)
+);
+
#endif /* _TRACE_IO_URING_H */
/* This part must be outside protection */
--
2.30.2
next prev parent reply other threads:[~2022-05-16 16:49 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-16 16:47 [RFC PATCH v2 00/16] io-uring/xfs: support async buffered writes Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 01/16] block: add check for async buffered writes to generic_write_checks Stefan Roesch
2022-05-16 23:43 ` Matthew Wilcox
2022-05-18 23:20 ` Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 02/16] iomap: add iomap_page_create_gfp to allocate iomap_pages Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 03/16] iomap: use iomap_page_create_gfp() in __iomap_write_begin Stefan Roesch
2022-05-16 23:58 ` Matthew Wilcox
2022-05-18 23:21 ` Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 04/16] iomap: add async buffered write support Stefan Roesch
2022-05-17 11:14 ` Jan Kara
2022-05-18 23:19 ` Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 05/16] xfs: add iomap " Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 06/16] fs: split off need_remove_file_privs() do_remove_file_privs() Stefan Roesch
2022-05-17 13:18 ` Christian Brauner
2022-05-18 23:25 ` Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 07/16] fs: split off need_file_update_time and do_file_update_time Stefan Roesch
2022-05-17 11:20 ` Jan Kara
2022-05-18 23:21 ` Stefan Roesch
2022-05-17 13:40 ` Christian Brauner
2022-05-18 23:28 ` Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 08/16] fs: add pending file update time flag Stefan Roesch
2022-05-17 11:28 ` Jan Kara
2022-05-17 13:48 ` Christian Brauner
2022-05-18 23:23 ` Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 09/16] xfs: enable async write file modification handling Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 10/16] xfs: add async buffered write support Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 11/16] io_uring: add support for async buffered writes Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 12/16] mm: factor out _balance_dirty_pages() from balance_dirty_pages() Stefan Roesch
2022-05-18 11:07 ` Jan Kara
2022-05-18 23:31 ` Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 13/16] mm: add balance_dirty_pages_ratelimited_flags() function Stefan Roesch
2022-05-17 20:12 ` Jan Kara
2022-05-18 23:29 ` Stefan Roesch
2022-05-16 16:47 ` [RFC PATCH v2 14/16] iomap: use balance_dirty_pages_ratelimited_flags in iomap_write_iter Stefan Roesch
2022-05-16 16:47 ` Stefan Roesch [this message]
2022-05-16 16:47 ` [RFC PATCH v2 16/16] xfs: enable async buffered write support Stefan Roesch
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