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Re: [Qemu-stable] [Qemu-devel] [PATCH] bitmap: Update count after a merg
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From: |
John Snow |
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Subject: |
Re: [Qemu-stable] [Qemu-devel] [PATCH] bitmap: Update count after a merge |
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Date: |
Fri, 9 Nov 2018 18:34:40 -0500 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 |
On 11/09/2018 12:57 PM, Eric Blake wrote:
> On 9/27/18 12:23 PM, John Snow wrote:
>>
>>
>> On 09/26/2018 11:11 PM, Eric Blake wrote:
>>> We need an accurate count of the number of bits set in a bitmap
>>> after a merge. In particular, since the merge operation short-circuits
>>> a merge from an empty source, if you have bitmaps A, B, and C where
>>> B started empty, then merge C into B, and B into A, an inaccurate
>>> count meant that A did not get the contents of C.
>>>
>
>>
>> OK, tests coming up. Thanks for the CC to stable.
>
> Did we ever add tests for this yet?
>
Running behind. Not yet. On my list.