Re: [PATCH v1] vdpa/mlx5: Restore the hardware used index after change map
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From: Si-Wei Liu <hidden>
Date: 2021-02-20 03:01:01
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On 2/19/2021 6:38 PM, Jason Wang wrote:
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Right now the value is exposed to userspace via GET_VRING_BASE, so only last_avail_idx is synced. If we need sync last_used_idx, we should also sync pending indices which requires more thoughts.Technically it doesn't sound right - crossing the boundary a bit even with simplified form of assumption. But depending on how userspace could make use of this API, it doesn't seem it breaks existing functionality for the moment.I don't get here, maybe you can explain a little bit more? Please refer to the email I just sent.
https://lore.kernel.org/lkml/033b0806-4037-5755-a1fa-91dbb58bab2e@oracle.com/ (local) -Siwei