From: Alasdair G Kergon <agk@redhat.com>
To: Kay Sievers <kay.sievers@vrfy.org>
Cc: device-mapper development <dm-devel@redhat.com>,
linux-hotplug-devel@lists.sourceforge.net
Subject: Re: [dm-devel] [PATCH] improve atomicity of device creation
Date: Tue, 11 Dec 2007 18:08:29 +0000 [thread overview]
Message-ID: <20071211180829.GW22311@agk.fab.redhat.com> (raw)
In-Reply-To: <3ae72650712110951h477d1fc0hd9abd39f069da105@mail.gmail.com>
On Tue, Dec 11, 2007 at 06:51:31PM +0100, Kay Sievers wrote:
> We can make the kernel's kobject_uevent() return the generated seqnum to
> the caller.
Is 32 bits enough?
We added 'uint32_t padding;' recently which we I reckon we could now use for
this.
dm_kobject_uevent() and alloc_dev() could keep a new field in
struct mapped_device up-to-date, and a new function could return its
value to dm-ioctl.c code to place into a renamed 'padding' field
before returning to userspace?
Alasdair
--
agk@redhat.com
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next prev parent reply other threads:[~2007-12-11 18:08 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-11 16:08 [PATCH] improve atomicity of device creation Scott James Remnant
2007-12-11 16:25 ` [dm-devel] " Alasdair G Kergon
2007-12-11 16:42 ` Scott James Remnant
2007-12-11 17:03 ` Alasdair G Kergon
2007-12-11 17:18 ` Scott James Remnant
2007-12-11 17:51 ` Kay Sievers
2007-12-11 18:08 ` Alasdair G Kergon [this message]
2007-12-11 18:25 ` Kay Sievers
2007-12-11 19:13 ` Alasdair G Kergon
2007-12-11 19:43 ` Alasdair G Kergon
2007-12-11 17:35 ` Kay Sievers
2007-12-11 17:40 ` Scott James Remnant
2007-12-11 17:53 ` Alasdair G Kergon
2007-12-11 19:09 ` Scott James Remnant
2007-12-11 18:03 ` Kay Sievers
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