Re: [Qemu-devel] [PATCH v4 3/6] qemu-iotests: Add _default_cache_mode and _supported_cache_modes

[Fam Zheng]

On 2013年12月03日 17:28, Kevin Wolf wrote:
> Am 03.12.2013 um 09:21 hat Fam Zheng geschrieben:
>> On 2013年12月03日 14:05, Wenchao Xia wrote:
>>
>>>
>>>     Why forbid mode = writeback?
>>>
>>
>> These test cases used to run with only possibly "writethrough", or "none".
>> And they don't work with writeback, at least in my case. So I didn't add
>> other modes here.
> 
> I suspect that the tests allowing writethrough might also work with
> directsync. Did you give that one a try?
> 

I guess so. Except for my /tmp is tmpfs and complains about O_DIRECT. It
works for me with "TMPDIR=/var/tmp".

> 026 has different output for wt and wb modes, this is why writeback
> fails. It should probably check against 026.out.nocache (which would
> have to be renamed as 026.out.wb) instead of 026.out. That's something
> for a separate series, though.
> 

Yes, good idea. I'll do this and the directsync including in the next
series.

Fam