From: Benjamin LaHaise <bcrl@kvack.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Chinner <david@fromorbit.com>,
linux-aio@kvack.org,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux API <linux-api@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 07/13] aio: enabled thread based async fsync
Date: Fri, 15 Jan 2016 15:21:31 -0500 [thread overview]
Message-ID: <20160115202131.GH6330@kvack.org> (raw)
In-Reply-To: <CA+55aFxCM-xWVR4jC=q2wSk+-WC1Xuf+nZLoud8JwKZopnR_dQ@mail.gmail.com>
On Mon, Jan 11, 2016 at 08:48:23PM -0800, Linus Torvalds wrote:
> On Mon, Jan 11, 2016 at 8:03 PM, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
> >
> > So my argument is really that I think it would be better to at least
> > look into maybe creating something less crapulent, and striving to
> > make it easy to make the old legacy interfaces be just wrappers around
> > a more capable model.
>
> Hmm. Thinking more about this makes me worry about all the system call
> versioning and extra work done by libc.
>
> At least glibc has traditionally decided to munge and extend on kernel
> system call interfaces, to the point where even fairly core data
> structures (like "struct stat") may not always look the same to the
> kernel as they do to user space.
>
> So with that worry, I have to admit that maybe a limited interface -
> rather than allowing arbitrary generic async system calls - might have
> advantages. Less room for mismatches.
>
> I'll have to think about this some more.
Any further thoughts on this after a few days worth of pondering?
-ben
> Linus
--
"Thought is the essence of where you are now."
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin LaHaise <bcrl@kvack.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Chinner <david@fromorbit.com>,
linux-aio@kvack.org,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux API <linux-api@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 07/13] aio: enabled thread based async fsync
Date: Fri, 15 Jan 2016 15:21:31 -0500 [thread overview]
Message-ID: <20160115202131.GH6330@kvack.org> (raw)
In-Reply-To: <CA+55aFxCM-xWVR4jC=q2wSk+-WC1Xuf+nZLoud8JwKZopnR_dQ@mail.gmail.com>
On Mon, Jan 11, 2016 at 08:48:23PM -0800, Linus Torvalds wrote:
> On Mon, Jan 11, 2016 at 8:03 PM, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
> >
> > So my argument is really that I think it would be better to at least
> > look into maybe creating something less crapulent, and striving to
> > make it easy to make the old legacy interfaces be just wrappers around
> > a more capable model.
>
> Hmm. Thinking more about this makes me worry about all the system call
> versioning and extra work done by libc.
>
> At least glibc has traditionally decided to munge and extend on kernel
> system call interfaces, to the point where even fairly core data
> structures (like "struct stat") may not always look the same to the
> kernel as they do to user space.
>
> So with that worry, I have to admit that maybe a limited interface -
> rather than allowing arbitrary generic async system calls - might have
> advantages. Less room for mismatches.
>
> I'll have to think about this some more.
Any further thoughts on this after a few days worth of pondering?
-ben
> Linus
--
"Thought is the essence of where you are now."
--
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WARNING: multiple messages have this Message-ID (diff)
From: Benjamin LaHaise <bcrl-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>
To: Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Cc: Dave Chinner <david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org>,
linux-aio-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
linux-fsdevel
<linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux Kernel Mailing List
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-mm <linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>,
Alexander Viro
<viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Subject: Re: [PATCH 07/13] aio: enabled thread based async fsync
Date: Fri, 15 Jan 2016 15:21:31 -0500 [thread overview]
Message-ID: <20160115202131.GH6330@kvack.org> (raw)
In-Reply-To: <CA+55aFxCM-xWVR4jC=q2wSk+-WC1Xuf+nZLoud8JwKZopnR_dQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Mon, Jan 11, 2016 at 08:48:23PM -0800, Linus Torvalds wrote:
> On Mon, Jan 11, 2016 at 8:03 PM, Linus Torvalds
> <torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org> wrote:
> >
> > So my argument is really that I think it would be better to at least
> > look into maybe creating something less crapulent, and striving to
> > make it easy to make the old legacy interfaces be just wrappers around
> > a more capable model.
>
> Hmm. Thinking more about this makes me worry about all the system call
> versioning and extra work done by libc.
>
> At least glibc has traditionally decided to munge and extend on kernel
> system call interfaces, to the point where even fairly core data
> structures (like "struct stat") may not always look the same to the
> kernel as they do to user space.
>
> So with that worry, I have to admit that maybe a limited interface -
> rather than allowing arbitrary generic async system calls - might have
> advantages. Less room for mismatches.
>
> I'll have to think about this some more.
Any further thoughts on this after a few days worth of pondering?
-ben
> Linus
--
"Thought is the essence of where you are now."
next prev parent reply other threads:[~2016-01-15 20:21 UTC|newest]
Thread overview: 133+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-11 22:06 [PATCH 00/13] aio: thread (work queue) based aio and new aio functionality Benjamin LaHaise
2016-01-11 22:06 ` Benjamin LaHaise
2016-01-11 22:06 ` [PATCH 01/13] signals: distinguish signals sent due to i/o via io_send_sig() Benjamin LaHaise
2016-01-11 22:06 ` Benjamin LaHaise
2016-01-11 22:06 ` Benjamin LaHaise
2016-01-11 22:06 ` [PATCH 02/13] aio: add aio_get_mm() helper Benjamin LaHaise
2016-01-11 22:06 ` Benjamin LaHaise
2016-01-11 22:06 ` Benjamin LaHaise
2016-01-11 22:06 ` [PATCH 03/13] aio: for async operations, make the iter argument persistent Benjamin LaHaise
2016-01-11 22:06 ` Benjamin LaHaise
2016-01-11 22:06 ` Benjamin LaHaise
2016-01-11 22:07 ` [PATCH 04/13] signals: add and use aio_get_task() to direct signals sent via io_send_sig() Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` [PATCH 05/13] fs: make do_loop_readv_writev() non-static Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` [PATCH 06/13] aio: add queue_work() based threaded aio support Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` [PATCH 07/13] aio: enabled thread based async fsync Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-12 1:11 ` Dave Chinner
2016-01-12 1:11 ` Dave Chinner
2016-01-12 1:20 ` Linus Torvalds
2016-01-12 1:20 ` Linus Torvalds
2016-01-12 2:25 ` Dave Chinner
2016-01-12 2:25 ` Dave Chinner
2016-01-12 2:25 ` Dave Chinner
2016-01-12 2:38 ` Linus Torvalds
2016-01-12 2:38 ` Linus Torvalds
2016-01-12 3:37 ` Dave Chinner
2016-01-12 3:37 ` Dave Chinner
2016-01-12 4:03 ` Linus Torvalds
2016-01-12 4:03 ` Linus Torvalds
2016-01-12 4:48 ` Linus Torvalds
2016-01-12 4:48 ` Linus Torvalds
2016-01-12 22:50 ` Benjamin LaHaise
2016-01-12 22:50 ` Benjamin LaHaise
2016-01-12 22:50 ` Benjamin LaHaise
2016-01-15 20:21 ` Benjamin LaHaise [this message]
2016-01-15 20:21 ` Benjamin LaHaise
2016-01-15 20:21 ` Benjamin LaHaise
2016-01-20 3:59 ` Linus Torvalds
2016-01-20 3:59 ` Linus Torvalds
2016-01-20 3:59 ` Linus Torvalds
2016-01-20 5:02 ` Theodore Ts'o
2016-01-20 5:02 ` Theodore Ts'o
2016-01-20 5:02 ` Theodore Ts'o
2016-01-20 19:59 ` Dave Chinner
2016-01-20 19:59 ` Dave Chinner
2016-01-20 19:59 ` Dave Chinner
2016-01-20 20:29 ` Linus Torvalds
2016-01-20 20:29 ` Linus Torvalds
2016-01-20 20:44 ` Benjamin LaHaise
2016-01-20 20:44 ` Benjamin LaHaise
2016-01-20 20:44 ` Benjamin LaHaise
2016-01-20 21:45 ` Dave Chinner
2016-01-20 21:45 ` Dave Chinner
2016-01-20 21:56 ` Benjamin LaHaise
2016-01-20 21:56 ` Benjamin LaHaise
2016-01-20 21:56 ` Benjamin LaHaise
2016-01-23 4:24 ` Dave Chinner
2016-01-23 4:24 ` Dave Chinner
2016-01-23 4:50 ` Benjamin LaHaise
2016-01-23 4:50 ` Benjamin LaHaise
2016-01-23 4:50 ` Benjamin LaHaise
2016-01-23 22:22 ` Dave Chinner
2016-01-23 22:22 ` Dave Chinner
2016-01-23 22:22 ` Dave Chinner
2016-01-20 23:07 ` Linus Torvalds
2016-01-23 4:39 ` Dave Chinner
2016-01-23 4:39 ` Dave Chinner
2016-01-23 4:39 ` Dave Chinner
2016-03-14 17:17 ` aio openat " Benjamin LaHaise
2016-03-14 17:17 ` Benjamin LaHaise
2016-03-20 1:20 ` Linus Torvalds
2016-03-20 1:20 ` Linus Torvalds
2016-03-20 1:26 ` Al Viro
2016-03-20 1:26 ` Al Viro
2016-03-20 1:26 ` Al Viro
2016-03-20 1:45 ` Linus Torvalds
2016-03-20 1:45 ` Linus Torvalds
2016-03-20 1:45 ` Linus Torvalds
2016-03-20 1:55 ` Al Viro
2016-03-20 1:55 ` Al Viro
2016-03-20 2:03 ` Linus Torvalds
2016-03-20 2:03 ` Linus Torvalds
2016-03-20 2:03 ` Linus Torvalds
2016-01-20 21:57 ` Dave Chinner
2016-01-20 21:57 ` Dave Chinner
2016-01-20 21:57 ` Dave Chinner
2016-01-22 15:41 ` Andres Freund
2016-01-22 15:41 ` Andres Freund
2016-01-12 22:59 ` Andy Lutomirski
2016-01-12 22:59 ` Andy Lutomirski
2016-01-12 22:59 ` Andy Lutomirski
2016-01-14 9:19 ` Paolo Bonzini
2016-01-14 9:19 ` Paolo Bonzini
2016-01-14 9:19 ` Paolo Bonzini
2016-01-12 1:30 ` Benjamin LaHaise
2016-01-12 1:30 ` Benjamin LaHaise
2016-01-12 1:30 ` Benjamin LaHaise
2016-01-22 15:31 ` Andres Freund
2016-01-22 15:31 ` Andres Freund
2016-01-22 15:31 ` Andres Freund
2016-01-11 22:07 ` [PATCH 08/13] aio: add support for aio poll via aio thread helper Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` [PATCH 09/13] aio: add support for async openat() Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-12 0:22 ` Linus Torvalds
2016-01-12 0:22 ` Linus Torvalds
2016-01-12 1:17 ` Benjamin LaHaise
2016-01-12 1:17 ` Benjamin LaHaise
2016-01-12 1:17 ` Benjamin LaHaise
2016-01-12 1:45 ` Chris Mason
2016-01-12 1:45 ` Chris Mason
2016-01-12 1:45 ` Chris Mason
2016-01-12 9:53 ` Ingo Molnar
2016-01-12 9:53 ` Ingo Molnar
2016-01-12 9:53 ` Ingo Molnar
2016-01-11 22:07 ` [PATCH 10/13] aio: add async unlinkat functionality Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` [PATCH 11/13] mm: enable __do_page_cache_readahead() to include present pages Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:07 ` [PATCH 12/13] aio: add support for aio readahead Benjamin LaHaise
2016-01-11 22:07 ` Benjamin LaHaise
2016-01-11 22:08 ` [PATCH 13/13] aio: add support for aio renameat operation Benjamin LaHaise
2016-01-11 22:08 ` Benjamin LaHaise
2016-01-11 22:08 ` Benjamin LaHaise
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