Re: [PATCH V3 0/2] Add support for enhanced atomic operations

[Vladimir Sokolovsky <vlad-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>]

Håkon Bugge wrote:
> Hi Vlad,
> 
> Did you consider my input in http://www.mail-archive.com/linux-rdma@vger.kernel.org/msg02803.html wrt. to these enhancements?
> 
>  
> 
> Thanks, Håkon
> 

Hi Håkon,
ConnectX devices do not support, currently, PCIe atomic operations.

Regards,
Vladimir

> On Mar 10, 2010, at 16:57 , Vladimir Sokolovsky wrote:
> 
>> Hi Roland,
>>
>> This patchset adds support for the following enhanced atomic
>> operations:
>> - Masked atomic compare and swap
>> - Masked atomic fetch and add
>>
>> These operations enable using a smaller amount of memory when using
>> multiple locks by using portions of a 64 bit value in an atomic
>> operation.
>> For some applications the memory savings are very significant. One
>> example is fine grain lock implementations for huge data sets. In
>> other cases, the benefit is the ability to update multiple fields with
>> a single io operation.
>>
>> Vladimir Sokolovsky(2):
>> IB/core: Add support for enhanced atomic operations
>> mlx4/IB: Add support for enhanced atomic operations
>>
>> changes from V2:
>> - patch #1: 
>>  Updated description
>>  Renamed:
>>        IB_WR_ATOMIC_MASKED_CMP_AND_SWP -> IB_WR_MASKED_ATOMIC_CMP_AND_SWP
>>        IB_WR_ATOMIC_MASKED_FETCH_AND_ADD -> IB_WR_MASKED_ATOMIC_FETCH_AND_ADD
>>  In the ib_send_wr struct the new fields added before the rkey field
>>
>> - patch #2:
>>  Set IB_DEVICE_MASKED_ATOMIC flag with other flags that get set for
>>  all devices
>>
>> Regards,
>> Vladimir
>> --
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> 
> Håkon Bugge
> Haakon.bugge-U0mLk4xYmo8@public.gmane.org
> +47 924 84 514
> 
> 
> 
> 

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