From: "H. Peter Anvin" <hpa@zytor.com>
To: Kay Sievers <kay.sievers@vrfy.org>
Cc: Mark Lord <lkml@rtr.ca>, Greg KH <gregkh@suse.de>,
Jens Axboe <axboe@kernel.dk>, Jeff Garzik <jgarzik@pobox.com>,
Tejun Heo <htejun@gmail.com>, Linus Torvalds <torvalds@osdl.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
IDE/ATA development list <linux-ide@vger.kernel.org>,
linux-scsi <linux-scsi@vger.kernel.org>
Subject: Re: What to do about the 2TB limit on HDIO_GETGEO ?
Date: Thu, 27 Mar 2008 11:55:23 -0700 [thread overview]
Message-ID: <47EBED9B.8020706@zytor.com> (raw)
In-Reply-To: <3ae72650803271151k5a7b5c4cn5078b3bdf6a9c87a@mail.gmail.com>
Kay Sievers wrote:
>>
>> And it's not just a few 10s of lines of code currently,
>> but rather about 80-100 lines just to find the correct device subdir,
>> and *then* a few more 10s of lines of code to retrieve the value.
>
> Hmm, 100 lines? What else do you need?
>
> $ grep -l 8:3 /sys/class/block/*/dev
> /sys/class/block/sdc/dev
>
That's particularly funny, because your very own example gives the wrong
result -- sdc is 8:32 not 8:3 (which is sdc3, which is also excluded by
your search.)
Not to mention the fact that it is still O(n).
-hpa
next prev parent reply other threads:[~2008-03-27 18:55 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <47E875AD.1000901@rtr.ca>
2008-03-25 4:02 ` What to do about the 2TB limit on HDIO_GETGEO ? Mark Lord
2008-03-25 4:19 ` Andrew Morton
2008-03-25 5:13 ` H. Peter Anvin
2008-03-25 13:37 ` Mark Lord
2008-03-25 13:55 ` H. Peter Anvin
2008-03-25 17:37 ` Mark Lord
2008-03-25 19:25 ` Greg KH
2008-03-25 19:34 ` Randy Dunlap
2008-03-25 20:36 ` H. Peter Anvin
2008-03-25 21:20 ` Greg KH
2008-03-25 21:26 ` H. Peter Anvin
2008-03-25 23:00 ` Greg KH
2008-03-25 23:05 ` H. Peter Anvin
2008-03-25 23:22 ` Greg KH
2008-03-27 19:05 ` Matthew Wilcox
2008-03-26 0:34 ` Mark Lord
2008-03-26 0:54 ` Tejun Heo
2008-03-26 3:38 ` Greg KH
2008-03-26 4:24 ` Tejun Heo
2008-03-26 6:04 ` H. Peter Anvin
2008-03-27 19:29 ` Kay Sievers
2008-03-27 19:38 ` H. Peter Anvin
2008-04-11 23:25 ` Dan Williams
2008-04-15 7:18 ` Andrew Morton
2008-04-15 13:47 ` Mark Lord
2008-04-15 14:20 ` James Bottomley
2008-04-15 18:16 ` H. Peter Anvin
2008-04-15 23:43 ` Dan Williams
2008-04-16 20:55 ` patch sysfs-add-sys-dev-char-block-to-lookup-sysfs-path-by-major-minor.patch added to gregkh-2.6 tree gregkh
2008-03-27 18:51 ` What to do about the 2TB limit on HDIO_GETGEO ? Kay Sievers
2008-03-27 18:55 ` H. Peter Anvin [this message]
2008-03-27 19:03 ` Kay Sievers
2008-03-25 15:17 ` James Bottomley
2008-03-25 17:31 ` Mark Lord
2008-03-25 19:32 ` James Bottomley
2008-03-25 17:45 ` Greg Freemyer
2008-03-25 17:52 ` Randy Dunlap
2008-03-25 18:09 ` Matthew Wilcox
2008-03-26 9:58 ` Boaz Harrosh
2008-03-30 4:28 ` Matt Domsch
[not found] ` <alpine.LFD.1.00.0803242254020.2775@woody.linux-foundation.org>
2008-03-25 13:34 ` Mark Lord
2008-03-25 13:51 ` Greg Freemyer
2008-03-25 14:31 ` Ric Wheeler
2008-03-25 15:25 ` Andrew Paprocki
2008-03-25 15:34 ` Matthew Wilcox
2008-03-25 15:48 ` Ric Wheeler
2008-03-25 16:47 ` Theodore Tso
2008-03-25 20:51 ` Theodore Tso
[not found] <abhxL-xC-7@gated-at.bofh.it>
[not found] ` <abhRd-1bf-15@gated-at.bofh.it>
[not found] ` <ablib-2zv-65@gated-at.bofh.it>
[not found] ` <abn0B-735-35@gated-at.bofh.it>
[not found] ` <abna7-7jK-3@gated-at.bofh.it>
[not found] ` <abo6b-11J-9@gated-at.bofh.it>
[not found] ` <aboSP-2Wf-29@gated-at.bofh.it>
[not found] ` <aboSP-2Wf-27@gated-at.bofh.it>
[not found] ` <abqrq-6eX-29@gated-at.bofh.it>
[not found] ` <abqrq-6eX-27@gated-at.bofh.it>
[not found] ` <abqKM-6Ka-13@gated-at.bofh.it>
2008-03-26 11:30 ` Bodo Eggert
[not found] ` <E1JeTq5-00018y-MO@be1.7eggert.dyndns.org>
2008-03-27 3:52 ` Greg KH
2008-03-27 4:57 ` H. Peter Anvin
2008-03-27 14:45 ` Mark Lord
2008-03-27 15:15 ` Greg KH
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