From: Eric Sandeen <esandeen-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Dave Chinner <david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org>,
Theodore Ts'o <tytso-3s7WtUTddSA@public.gmane.org>,
Ric Wheeler <rwheeler-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>,
One Thousand Gnomes
<gnomes-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>,
Gregory Farnum <greg-3KCAGdo1P2hBDgjK7y7TUQ@public.gmane.org>,
"Martin K. Petersen"
<martin.petersen-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
"Darrick J. Wong"
<darrick.wong-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
Jens Axboe <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux Kernel Mailing List
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
shane.seymour-ZPxbGqLxI0U@public.gmane.org,
Bruce Fields <bfields-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>,
linux-fsdevel
<linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Jeff Layton <jlayton-vpEMnDpepFuMZCB2o+C8xQ@public.gmane.org>
Subject: Re: [PATCH 2/2] block: create ioctl to discard-or-zeroout a range of blocks
Date: Tue, 15 Mar 2016 17:38:21 -0500 [thread overview]
Message-ID: <56E88EDD.7030102@redhat.com> (raw)
In-Reply-To: <20160315201431.GG30721@dastard>
On 3/15/16 3:14 PM, Dave Chinner wrote:
> What we are missing is actual numbers that show that exposing stale
> data is a /significant/ win for these applications that are
> demanding it. And then we need evidence proving that the problem is
> actually systemic and not just a hack around a bad implementation of
> a feature...
Thanks Dave; I totally agree on this point. We've spent more than enough
time talking about how and if to implement stale data exposure, but nowhere
in this thread has there been any actual performance data indicating why
we should do it at all.
-Eric
WARNING: multiple messages have this Message-ID (diff)
From: Eric Sandeen <esandeen@redhat.com>
To: Dave Chinner <david@fromorbit.com>,
"Theodore Ts'o" <tytso@mit.edu>,
Ric Wheeler <rwheeler@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andy Lutomirski <luto@amacapital.net>,
One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
Gregory Farnum <greg@gregs42.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Christoph Hellwig <hch@infradead.org>,
"Darrick J. Wong" <darrick.wong@oracle.com>,
Jens Axboe <axboe@kernel.dk>,
Andrew Morton <akpm@linux-foundation.org>,
Linux API <linux-api@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
shane.seymour@hpe.com, Bruce Fields <bfields@fieldses.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Jeff Layton <jlayton@poochiereds.net>
Subject: Re: [PATCH 2/2] block: create ioctl to discard-or-zeroout a range of blocks
Date: Tue, 15 Mar 2016 17:38:21 -0500 [thread overview]
Message-ID: <56E88EDD.7030102@redhat.com> (raw)
In-Reply-To: <20160315201431.GG30721@dastard>
On 3/15/16 3:14 PM, Dave Chinner wrote:
> What we are missing is actual numbers that show that exposing stale
> data is a /significant/ win for these applications that are
> demanding it. And then we need evidence proving that the problem is
> actually systemic and not just a hack around a bad implementation of
> a feature...
Thanks Dave; I totally agree on this point. We've spent more than enough
time talking about how and if to implement stale data exposure, but nowhere
in this thread has there been any actual performance data indicating why
we should do it at all.
-Eric
next prev parent reply other threads:[~2016-03-15 22:38 UTC|newest]
Thread overview: 135+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-02 4:09 [PATCH v5.1 0/2] create BLKZEROOUT ioctl that invalidates page cache Darrick J. Wong
2016-03-02 4:09 ` [PATCH 1/2] block: invalidate the page cache when issuing BLKZEROOUT Darrick J. Wong
2016-03-02 9:19 ` Christoph Hellwig
2016-03-02 4:09 ` [PATCH 2/2] block: create ioctl to discard-or-zeroout a range of blocks Darrick J. Wong
2016-03-02 9:20 ` Christoph Hellwig
[not found] ` <20160302040947.16685.42926.stgit-PTl6brltDGh4DFYR7WNSRA@public.gmane.org>
2016-03-02 18:52 ` Linus Torvalds
2016-03-02 18:52 ` Linus Torvalds
2016-03-02 22:56 ` Darrick J. Wong
2016-03-02 23:49 ` Linus Torvalds
2016-03-03 17:02 ` Theodore Ts'o
[not found] ` <20160303170205.GD24012-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2016-03-03 17:55 ` Linus Torvalds
2016-03-03 17:55 ` Linus Torvalds
[not found] ` <CA+55aFwPA1X8XGTdVZmP5uzkWMwj+X=bjkGVcEkZDme+qskrzQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-03 18:00 ` Christoph Hellwig
2016-03-03 18:00 ` Christoph Hellwig
2016-03-03 18:14 ` Martin K. Petersen
2016-03-03 18:14 ` Martin K. Petersen
2016-03-03 18:21 ` Theodore Ts'o
2016-03-03 18:21 ` Theodore Ts'o
[not found] ` <CA+55aFyNPnjJ-Nsu3bMr+HuLQnkj1B8FMddNnXW7HJqxdUzJmQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-03 18:01 ` Martin K. Petersen
2016-03-03 18:01 ` Martin K. Petersen
[not found] ` <yq1bn6v8mqg.fsf-+q57XtR/GgMb6DWv4sQWN6xOck334EZe@public.gmane.org>
2016-03-03 18:09 ` Christoph Hellwig
2016-03-03 18:09 ` Christoph Hellwig
[not found] ` <20160303180924.GA4116-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2016-03-03 18:12 ` Darrick J. Wong
2016-03-03 18:12 ` Darrick J. Wong
2016-03-03 18:54 ` Martin K. Petersen
[not found] ` <yq1vb5375oh.fsf-+q57XtR/GgMb6DWv4sQWN6xOck334EZe@public.gmane.org>
2016-03-03 22:39 ` Theodore Ts'o
2016-03-03 22:39 ` Theodore Ts'o
[not found] ` <20160303223952.GE24012-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2016-03-03 23:10 ` Dave Chinner
2016-03-03 23:10 ` Dave Chinner
2016-03-04 0:20 ` Theodore Ts'o
2016-03-04 0:20 ` Theodore Ts'o
2016-03-09 22:20 ` Gregory Farnum
2016-03-09 22:20 ` Gregory Farnum
2016-03-09 23:08 ` Theodore Ts'o
2016-03-10 14:58 ` Ric Wheeler
[not found] ` <56E18B9B.5070503-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-03-10 18:33 ` Linus Torvalds
2016-03-10 18:33 ` Linus Torvalds
[not found] ` <CA+55aFyw1nN4ze3-AGGE27evOZuXnkJC9C-W5QRUR=zKHqObGg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-10 21:47 ` Theodore Ts'o
2016-03-10 21:47 ` Theodore Ts'o
2016-03-11 4:42 ` Ric Wheeler
2016-03-11 13:59 ` One Thousand Gnomes
[not found] ` <20160311135952.57a44931-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>
2016-03-11 15:27 ` Theodore Ts'o
2016-03-11 15:27 ` Theodore Ts'o
2016-03-11 17:23 ` Linus Torvalds
[not found] ` <CA+55aFwX2GYYN53E9qaTym=gp1aRjSA5f1G+N5WEiRd1dOJhFA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-11 17:30 ` Andy Lutomirski
2016-03-11 17:30 ` Andy Lutomirski
2016-03-11 18:25 ` Linus Torvalds
[not found] ` <CA+55aFxQOgDjL643J33d-3q7gYGvyN84vCn4qJq-Ox8E-WRx9w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-11 22:30 ` Dave Chinner
2016-03-11 22:30 ` Dave Chinner
2016-03-12 0:33 ` Linus Torvalds
2016-03-12 0:33 ` Linus Torvalds
2016-03-12 0:35 ` Theodore Ts'o
2016-03-12 0:35 ` Theodore Ts'o
[not found] ` <20160312003556.GF32214-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2016-03-12 0:44 ` Linus Torvalds
2016-03-12 0:44 ` Linus Torvalds
2016-03-12 7:19 ` Theodore Ts'o
[not found] ` <20160312071945.GA3419-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2016-03-12 10:11 ` Thomas Schoebel-Theuer
2016-03-12 10:11 ` Thomas Schoebel-Theuer
2016-03-13 23:30 ` Dave Chinner
2016-03-13 23:30 ` Dave Chinner
2016-03-14 10:34 ` Ric Wheeler
2016-03-14 10:34 ` Ric Wheeler
[not found] ` <56E69398.7030508-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-03-14 14:46 ` Theodore Ts'o
2016-03-14 14:46 ` Theodore Ts'o
2016-03-15 20:14 ` Dave Chinner
2016-03-15 20:43 ` Linus Torvalds
2016-03-15 20:43 ` Linus Torvalds
[not found] ` <CA+55aFwHLJffmN-Dw=yZCGKzxe_2Tm9h2GjdaFL3JdvYXNstRw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-15 21:29 ` Theodore Ts'o
2016-03-15 21:29 ` Theodore Ts'o
2016-03-15 22:33 ` Dave Chinner
2016-03-15 22:33 ` Dave Chinner
2016-03-15 22:52 ` Theodore Ts'o
2016-03-16 1:51 ` Darrick J. Wong
[not found] ` <20160316015139.GC5826-PTl6brltDGh4DFYR7WNSRA@public.gmane.org>
2016-03-16 21:45 ` Andreas Dilger
2016-03-16 21:45 ` Andreas Dilger
[not found] ` <7674C689-C07E-4D38-85EB-4FD9B55CBB35-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org>
2016-03-17 0:15 ` Theodore Ts'o
2016-03-17 0:15 ` Theodore Ts'o
[not found] ` <20160317001502.GF23593-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2016-03-17 0:33 ` Eric Sandeen
2016-03-17 0:33 ` Eric Sandeen
2016-03-17 0:59 ` Theodore Ts'o
[not found] ` <56E9FB73.6040803-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-03-17 5:18 ` Gregory Farnum
2016-03-17 5:18 ` Gregory Farnum
2016-03-17 12:36 ` Theodore Ts'o
[not found] ` <CAC6JEv-CGaphHj6hVXUhFS+Dc4jS46nO1yOfKF5yA8AnDwqgOw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-17 17:47 ` Linus Torvalds
2016-03-17 17:47 ` Linus Torvalds
2016-03-17 17:50 ` Ric Wheeler
2016-03-17 17:59 ` Linus Torvalds
2016-03-17 18:35 ` Chris Mason
2016-03-17 18:35 ` Chris Mason
[not found] ` <20160317183512.GA76233-HIXDwvFErZjFYCXBM6kdu7fOX0fSgVTm@public.gmane.org>
2016-03-17 20:49 ` Andreas Dilger
2016-03-17 20:49 ` Andreas Dilger
[not found] ` <819F38A3-51A7-4874-8314-8A6004495716-m1MBpc4rdrD3fQ9qLvQP4Q@public.gmane.org>
2016-03-17 21:00 ` Chris Mason
2016-03-17 21:00 ` Chris Mason
[not found] ` <20160317210018.GA78710-HIXDwvFErZjFYCXBM6kdu7fOX0fSgVTm@public.gmane.org>
2016-03-18 3:20 ` Theodore Ts'o
2016-03-18 3:20 ` Theodore Ts'o
[not found] ` <20160318032023.GK23593-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2016-03-18 15:15 ` Jeff Moyer
2016-03-18 15:15 ` Jeff Moyer
[not found] ` <x491t7795ro.fsf-RRHT56Q3PSP4kTEheFKJxxDDeQx5vsVwAInAS/Ez/D0@public.gmane.org>
2016-03-18 20:05 ` Martin K. Petersen
2016-03-18 20:05 ` Martin K. Petersen
[not found] ` <CA+55aFzbzXb9ApP5FnVZihWRpWGO1-YnJj_Giip5LfD6=uvf0w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-18 6:52 ` Gregory Farnum
2016-03-18 6:52 ` Gregory Farnum
[not found] ` <CAC6JEv-MuU2sWSvftjHhOhZsE2Fz49Ffv6cm1FMnju5egcyvmQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-18 7:19 ` Linus Torvalds
2016-03-18 7:19 ` Linus Torvalds
2016-03-17 1:01 ` Dave Chinner
2016-03-17 1:01 ` Dave Chinner
2016-03-17 2:38 ` Darrick J. Wong
[not found] ` <20160315225224.GD23848-AKGzg7BKzIDYtjvyW6yDsg@public.gmane.org>
2016-03-18 22:55 ` NeilBrown
2016-03-18 22:55 ` NeilBrown
2016-03-15 23:06 ` Linus Torvalds
[not found] ` <CA+55aFxCpza3_3J8kP9E0gLKHiSitZHjC4UMS_ZfZ_HBTC9=Bg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-15 23:14 ` Linus Torvalds
2016-03-15 23:14 ` Linus Torvalds
[not found] ` <CA+55aFw80NXB9L7ooxV0zr3oaf4zWzZAJcb87ib58n=toiCn7g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-16 0:08 ` Dave Chinner
2016-03-16 0:08 ` Dave Chinner
2016-03-15 23:52 ` Dave Chinner
2016-03-16 0:06 ` Linus Torvalds
[not found] ` <CA+55aFxZ=feGd+QGdhCN28kjd2XJO3PCj9NBoJJZ5E8_WMJiMA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-16 0:30 ` Eric Sandeen
2016-03-16 0:30 ` Eric Sandeen
[not found] ` <56E8A916.8050702-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-03-16 0:51 ` Chris Mason
2016-03-16 0:51 ` Chris Mason
[not found] ` <20160316005117.GA34410-HIXDwvFErZjFYCXBM6kdu7fOX0fSgVTm@public.gmane.org>
2016-03-16 22:23 ` Chris Mason
2016-03-16 22:23 ` Chris Mason
[not found] ` <20160316222343.GA53649-HIXDwvFErZjFYCXBM6kdu7fOX0fSgVTm@public.gmane.org>
2016-03-17 13:49 ` Ric Wheeler
2016-03-17 13:49 ` Ric Wheeler
2016-03-15 22:38 ` Eric Sandeen [this message]
2016-03-15 22:38 ` Eric Sandeen
2016-03-03 22:56 ` Dave Chinner
2016-03-04 2:30 ` Thomas Schoebel-Theuer
2016-03-04 2:30 ` Thomas Schoebel-Theuer
2016-03-03 18:14 ` Linus Torvalds
2016-03-03 18:14 ` Linus Torvalds
2016-03-02 9:15 ` [PATCH v5.1 0/2] create BLKZEROOUT ioctl that invalidates page cache Arnd Bergmann
2016-03-02 9:44 ` Christoph Hellwig
2016-03-02 9:44 ` Christoph Hellwig
[not found] ` <20160302094416.GA16631-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2016-03-02 10:55 ` Arnd Bergmann
2016-03-02 10:55 ` Arnd Bergmann
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