* file creation timing
@ 2005-02-02 20:53 Dave Hansen
2005-02-02 21:13 ` Kay Sievers
0 siblings, 1 reply; 2+ messages in thread
From: Dave Hansen @ 2005-02-02 20:53 UTC (permalink / raw)
To: linux-hotplug
For memory hotplug, I register each of my memory kobjects, followed by
their individual files. I'm seeing races where the hotplug scripts get
the event for the main register before all of the control files are
there.
ret = register_memory(mem, section, NULL);
mem_create_simple_file(mem, phys_index);
mem_create_simple_file(mem, state);
mem_create_simple_file(mem, phys_device);
The script sees the /sys/.../memory directory before it sees the "state"
file. Is there a handy way around this other than sleeping in the
script? Can I somehow delay that registration event?
-- Dave
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^ permalink raw reply [flat|nested] 2+ messages in thread* Re: file creation timing
2005-02-02 20:53 file creation timing Dave Hansen
@ 2005-02-02 21:13 ` Kay Sievers
0 siblings, 0 replies; 2+ messages in thread
From: Kay Sievers @ 2005-02-02 21:13 UTC (permalink / raw)
To: linux-hotplug
On Wed, 2005-02-02 at 12:53 -0800, Dave Hansen wrote:
> For memory hotplug, I register each of my memory kobjects, followed by
> their individual files. I'm seeing races where the hotplug scripts get
> the event for the main register before all of the control files are
> there.
>
> ret = register_memory(mem, section, NULL);
> mem_create_simple_file(mem, phys_index);
> mem_create_simple_file(mem, state);
> mem_create_simple_file(mem, phys_device);
>
> The script sees the /sys/.../memory directory before it sees the "state"
> file. Is there a handy way around this other than sleeping in the
> script?
You may use udev to manage the hotplug events by setting /sbin/udevsend
as the hotplug helper. It will wait until sysfs is populated.
> Can I somehow delay that registration event?
No, not today, not without doing crazy stuff.
Kay
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