[sheepdog] [RFC PATCH] object cache: revert object_cache_pull() to older version

[Liu Yuan]

On 06/04/2012 04:53 PM, MORITA Kazutaka wrote:

> One possibility is that if forward_write_obj_req() fails before
> receiving data, the next forward_(read|write)_obj_req() could be
> interleaved.
> 
> The below untested patch may fix the problem though the approach is a
> poor way.


Well, from the log:

Jun 04 10:16:37 do_gateway_request(288) 2, 80d6d76e00000000 , 1
Jun 04 10:16:37 do_gateway_request(308) failed: 2, 80d6d76e00000000 , 1,
54014b01

It is a read request, which is supposed to be handled to object cache
layer, and should object_cache_pull(), then calls
forward_read_obj_req(), which failed (maybe this is why we didn't get
any log about it). Note, there were two requests to 80d6d76e00000000
meanwhile.

Thanks,
Yuan