From: Linus Torvalds <torvalds@linux-foundation.org>
To: Christoph Hellwig <hch@lst.de>
Cc: kernel test robot <rong.a.chen@intel.com>,
Al Viro <viro@zeniv.linux.org.uk>, Ian Kent <raven@themaw.net>,
David Howells <dhowells@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
LSM List <linux-security-module@vger.kernel.org>,
NetFilter <netfilter-devel@vger.kernel.org>,
lkp@lists.01.org
Subject: Re: [fs] 140402bab8: stress-ng.splice.ops_per_sec -100.0% regression
Date: Wed, 1 Jul 2020 13:32:03 -0700 [thread overview]
Message-ID: <CAHk-=whYihRm0brAXPc0dFcsU2M+FA4VoOiwGGdVLC_sHT=M1g@mail.gmail.com> (raw)
In-Reply-To: <20200701121344.GA14149@lst.de>
On Wed, Jul 1, 2020 at 5:13 AM Christoph Hellwig <hch@lst.de> wrote:
>
> FYI, this is because stress-nh tests splice using /dev/null. Which
> happens to actually have the iter ops, but doesn't have explicit
> splice_read operation.
Heh. I guess a splice op for /dev/null should be fairly trivial to implement..
Linus
next prev parent reply other threads:[~2020-07-01 20:32 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-24 16:13 clean up kernel_{read,write} & friends v5 Christoph Hellwig
2020-06-24 16:13 ` [PATCH 01/14] cachefiles: switch to kernel_write Christoph Hellwig
2020-06-24 16:13 ` [PATCH 02/14] autofs: " Christoph Hellwig
2020-06-24 16:13 ` [PATCH 03/14] bpfilter: " Christoph Hellwig
2020-06-24 16:13 ` [PATCH 04/14] fs: unexport __kernel_write Christoph Hellwig
2020-06-24 16:13 ` [PATCH 05/14] fs: check FMODE_WRITE in __kernel_write Christoph Hellwig
2020-06-24 16:13 ` [PATCH 06/14] fs: implement kernel_write using __kernel_write Christoph Hellwig
2020-06-24 16:13 ` [PATCH 07/14] fs: remove __vfs_write Christoph Hellwig
2020-06-24 16:13 ` [PATCH 08/14] fs: don't change the address limit for ->write_iter in __kernel_write Christoph Hellwig
2020-06-24 16:13 ` [PATCH 09/14] fs: add a __kernel_read helper Christoph Hellwig
2020-06-24 16:13 ` [PATCH 10/14] integrity/ima: switch to using __kernel_read Christoph Hellwig
2020-06-24 16:13 ` [PATCH 11/14] fs: implement kernel_read " Christoph Hellwig
2020-06-24 16:13 ` [PATCH 12/14] fs: remove __vfs_read Christoph Hellwig
2020-06-24 16:13 ` [PATCH 13/14] fs: implement default_file_splice_read using __kernel_read Christoph Hellwig
2020-07-01 9:19 ` [fs] 140402bab8: stress-ng.splice.ops_per_sec -100.0% regression kernel test robot
2020-07-01 12:13 ` Christoph Hellwig
2020-07-01 20:32 ` Linus Torvalds [this message]
2020-06-24 16:13 ` [PATCH 14/14] fs: don't change the address limit for ->read_iter in __kernel_read Christoph Hellwig
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