[i2c] i2c or eeprom enumeration problem

Andrew Morton akpm at linux-foundation.org
Mon Apr 28 14:05:15 CEST 2008


On Sun, 27 Apr 2008 21:20:42 -0700 Ulrich Drepper <drepper at redhat.com> wrote:

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> On a NUMA system the eeprom interface in /sys
> 
>   /sys/bus/i2c/drivers/eeprom/*
> 
> do not list all the DRAM eeproms.  Only the DRAM from one node is
> listed.  I have a 4 socket system with all 16 banks filled and see only
> 4 entries.
> 
> My suspicion (without looking at any code) is that the list of i2c
> devices with eeproms is collected once and this happens only on one CPU.
>  I sees not to be dynamic since when I read the files with taskset
> restricting execution on certain sockets and cores the result doesn't
> change.
> 
> Is this known or expected (I hope not the latter)?  Where should I look
> at?  I assume that's in the i2c code?
> 

Let's cc the i2c list.



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