From: David Howells <dhowells@redhat.com>
To: Jens Axboe <axboe@kernel.dk>, Al Viro <viro@zeniv.linux.org.uk>,
Christoph Hellwig <hch@infradead.org>
Cc: David Howells <dhowells@redhat.com>,
Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>,
Jeff Layton <jlayton@kernel.org>,
David Hildenbrand <david@redhat.com>,
Jason Gunthorpe <jgg@nvidia.com>,
Logan Gunthorpe <logang@deltatee.com>,
Hillf Danton <hdanton@sina.com>,
Christian Brauner <brauner@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Christoph Hellwig <hch@lst.de>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
linux-trace-kernel@vger.kernel.org
Subject: [PATCH v21 26/30] splice: Convert trace/seq to use copy_splice_read()
Date: Sat, 20 May 2023 01:00:45 +0100 [thread overview]
Message-ID: <20230520000049.2226926-27-dhowells@redhat.com> (raw)
In-Reply-To: <20230520000049.2226926-1-dhowells@redhat.com>
For the splice from the trace seq buffer, just use copy_splice_read().
In the future, something better can probably be done by gifting pages from
seq->buf into the pipe, but that would require changing seq->buf into a
vmap over an array of pages.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Steven Rostedt <rostedt@goodmis.org>
cc: Masami Hiramatsu <mhiramat@kernel.org>
cc: linux-kernel@vger.kernel.org
cc: linux-trace-kernel@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-block@vger.kernel.org
cc: linux-mm@kvack.org
---
kernel/trace/trace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index ebc59781456a..c210d02fac97 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5171,7 +5171,7 @@ static const struct file_operations tracing_fops = {
.open = tracing_open,
.read = seq_read,
.read_iter = seq_read_iter,
- .splice_read = generic_file_splice_read,
+ .splice_read = copy_splice_read,
.write = tracing_write_stub,
.llseek = tracing_lseek,
.release = tracing_release,
next prev parent reply other threads:[~2023-05-20 0:05 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-20 0:00 [PATCH v21 00/30] splice: Kill ITER_PIPE David Howells
2023-05-20 0:00 ` [PATCH v21 01/30] splice: Fix filemap of a blockdev David Howells
2023-05-20 4:08 ` Christoph Hellwig
2023-05-20 9:14 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 02/30] splice: Make filemap_splice_read() check s_maxbytes David Howells
2023-05-20 4:09 ` Christoph Hellwig
2023-05-20 9:21 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 03/30] splice: Rename direct_splice_read() to copy_splice_read() David Howells
2023-05-20 4:09 ` Christoph Hellwig
2023-05-20 9:23 ` Christian Brauner
2023-05-20 9:51 ` David Howells
2023-05-22 7:55 ` David Howells
2023-05-22 12:53 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 04/30] splice: Clean up copy_splice_read() a bit David Howells
2023-05-20 9:34 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 05/30] splice: Make do_splice_to() generic and export it David Howells
2023-05-20 9:35 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 06/30] splice: Check for zero count in vfs_splice_read() David Howells
2023-05-20 9:38 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 07/30] splice: Make splice from an O_DIRECT fd use copy_splice_read() David Howells
2023-05-20 4:11 ` Christoph Hellwig
2023-05-20 9:39 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 08/30] splice: Make splice from a DAX file " David Howells
2023-05-20 4:11 ` Christoph Hellwig
2023-05-20 9:41 ` Christian Brauner
2023-05-21 0:28 ` Theodore Ts'o
2023-05-21 14:55 ` Gao Xiang
2023-05-20 0:00 ` [PATCH v21 09/30] shmem: Implement splice-read David Howells
2023-05-20 0:00 ` [PATCH v21 10/30] overlayfs: " David Howells
2023-05-20 9:47 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 11/30] coda: " David Howells
2023-05-20 0:00 ` [PATCH v21 12/30] tty, proc, kernfs, random: Use copy_splice_read() David Howells
2023-05-20 0:00 ` [PATCH v21 13/30] net: Make sock_splice_read() use copy_splice_read() by default David Howells
2023-05-20 0:00 ` [PATCH v21 14/30] 9p: Add splice_read stub David Howells
2023-05-20 0:00 ` [PATCH v21 15/30] afs: Provide a splice-read stub David Howells
2023-05-20 0:00 ` [PATCH v21 16/30] ceph: " David Howells
2023-05-22 2:12 ` Xiubo Li
2023-05-20 0:00 ` [PATCH v21 17/30] ecryptfs: " David Howells
2023-05-20 0:00 ` [PATCH v21 18/30] ext4: " David Howells
2023-05-20 4:12 ` Christoph Hellwig
2023-05-20 7:21 ` David Howells
2023-05-20 9:01 ` Christoph Hellwig
2023-05-21 0:26 ` Theodore Ts'o
2023-05-20 0:00 ` [PATCH v21 19/30] f2fs: " David Howells
2023-07-06 0:18 ` [f2fs-dev] " patchwork-bot+f2fs
2023-05-20 0:00 ` [PATCH v21 20/30] nfs: " David Howells
2023-05-20 0:00 ` [PATCH v21 21/30] ntfs3: " David Howells
2023-05-20 0:00 ` [PATCH v21 22/30] ocfs2: " David Howells
2023-05-22 2:49 ` Joseph Qi
2023-05-22 6:28 ` David Howells
2023-05-22 6:34 ` Joseph Qi
2023-05-22 6:49 ` David Howells
2023-05-22 6:54 ` Joseph Qi
2023-05-20 0:00 ` [PATCH v21 23/30] orangefs: " David Howells
2023-05-20 0:00 ` [PATCH v21 24/30] xfs: " David Howells
2023-05-20 4:13 ` Christoph Hellwig
2023-05-20 0:00 ` [PATCH v21 25/30] zonefs: " David Howells
2023-05-20 0:00 ` David Howells [this message]
2023-05-20 4:14 ` [PATCH v21 26/30] splice: Convert trace/seq to use copy_splice_read() Christoph Hellwig
2023-05-21 10:28 ` Masami Hiramatsu
2023-05-21 12:50 ` David Howells
2023-05-23 14:27 ` Steven Rostedt
2023-05-20 0:00 ` [PATCH v21 27/30] cifs: Use filemap_splice_read() David Howells
2023-05-20 0:00 ` [PATCH v21 28/30] splice: Use filemap_splice_read() instead of generic_file_splice_read() David Howells
2023-05-20 4:14 ` Christoph Hellwig
2023-05-20 9:56 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 29/30] splice: Remove generic_file_splice_read() David Howells
2023-05-20 4:14 ` Christoph Hellwig
2023-05-20 9:57 ` Christian Brauner
2023-05-20 0:00 ` [PATCH v21 30/30] iov_iter: Kill ITER_PIPE David Howells
2023-05-20 4:15 ` Christoph Hellwig
2023-05-20 9:58 ` Christian Brauner
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