[dm-devel] [PATCH] Fix race-condition when reading sysfs attributes.

[Konrad Rzeszutek]

On Tue, Mar 24, 2009 at 04:34:38PM +0100, Kay Sievers wrote:
> On Tue, Mar 24, 2009 at 16:24, Konrad Rzeszutek <konrad at virtualiron.com> wrote:
> > This fix re-introduces a wait loop when reading sysfs attributes.
> > The reason a wait is necessary is due to the way the kernel
> > sends the event.
> 
> > There are four uevents sent from the kernel in the creation of
> > a SysFS representation of the device. After the last event, the
> > SysFs entries for vendor,model, rev are populated. The window
> > time between the uevent with /block/sdX sent and the sysfs
> > attributes being populated is small.
> 
> What kernel version are you using? I thought we fixed all that long ago.

RHEL5.3. Which I thought had many of the fixes from upstream. Let me build
the most recent version and see if I can trigger these issues on that
version.

> 
> Thanks,
> Kay
> 
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