Message-ID: <20080201082152.GE4500@gollum.tnic>
Date:	Fri, 1 Feb 2008 09:21:52 +0100
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: [PATCH 0/32] ide-tape redux v1

On Wed, Jan 30, 2008 at 01:29:55AM +0100, Bartlomiej Zolnierkiewicz wrote:
> On Monday 28 January 2008, Borislav Petkov wrote:
> > Hi Bart,
> > 
> > [...]
> > 
> > > > the BKL in idetape_write_release() with finer-grained locking etc, probably also
> > > > some pipeline improvements, removal of OnStream support, etc. but that'll come
> > > > later.
> > > 
> > > On-Stream support has been long gone but it seems that deprecation
> > > warning etc. managed to survive.
> > > 
> > > w.r.t. to the pipeline-mode: it should be pipelined into /dev/null
> > > 
> > > rationale:
> > > - it is _very_ complex
> > > - causes errors to be deferred till the next user-space access
> > > - direct I/O using blk_rq_map_user() will offer superior performance
> > > 
> > > the only question is whether to remove it...
> > 
> > Well, on the one hand, since the driver is only being maintained we should not
> > remove code that works. Also, i don't know how many users ide-tape really has
> > but, would it be worth the trouble at all? Because if nobody's using it, we
> > could just as well pipe the whole thing into /dev/null.. On the other hand, the
> 
> This may be the other alternative... [ there is always libata PATA... ]
> 
> If you want to give ide-tape removal a try, go ahead (I suggest starting
> with adding warning printk() and keeping patch in -mm for some time)...

Well, we don't have any numbers on whether someone is using the driver at all,
so i probably the best thing we should do is give it a grace period of 1/2 year
before we get rid of it. In the meantime, let's see how many souls cry out :)

---
commit 5b4566d1ed9b050d53d776285da84f8c3cc13d2c
Author: Borislav Petkov <petkovbb@...il.com>
Date:   Fri Feb 1 09:12:02 2008 +0100

    ide-tape: schedule driver for removal after 6 months in case it doesn't have
    any users left.

    Signed-off-by: Borislav Petkov <petkovbb@...il.com>

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 20c4c8b..21d71a9 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -333,3 +333,13 @@ Why:	This driver has been marked obsolete for many years.
 Who:	Stephen Hemminger <shemminger@...ux-foundation.org>
 
 ---------------------------
+
+What:	ide-tape driver
+When:	July 2008
+Files:	drivers/ide/ide-tape.c
+Why:	This driver might not have any users anymore and maintaining it for no
+	reason is an effort no one wants to make.
+Who:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>, Borislav Petkov
+	<petkovbb@...glemail.com>
+
+---------------------------
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index f51712c..fd81f4c 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -3829,6 +3829,11 @@ static int ide_tape_probe(ide_drive_t *drive)
 	g->fops = &idetape_block_ops;
 	ide_register_region(g);
 
+	printk(KERN_WARNING "It is possible that this driver does not have any"
+		" users anymore and, as a result, it will be REMOVED soon."
+		" Please notify Bart <bzolnier@...il.com> or Boris"
+		" <petkovbb@...il.com> in case you still need it.\n");
+
 	return 0;
 
 out_free_tape:

-- 
Regards/Gruß,
    Boris.
--
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