Re: [PATCH v2] xen-blkback: fix persistent grants negotiation

2022-07-15 Thread SeongJae Park
Hello, Oleksandr, thank you for Cc-ing Andrii. Andrii, thank you for the comment! On Fri, 15 Jul 2022 15:00:10 +0300 Andrii Chepurnyi wrote: > [-- Attachment #1: Type: text/plain, Size: 5237 bytes --] > > Hello All, > > I faced the mentioned issue recently and just to bring more context he

Re: [PATCH v2] xen-blkback: fix persistent grants negotiation

2022-07-15 Thread Andrii Chepurnyi
Hello All, I faced the mentioned issue recently and just to bring more context here is our setup: We use pvblock backend for Android guest. It starts using u-boot with pvblock support(which frontend doesn't support the persistent grants feature), later it loads and starts the Linux kernel(which fr

Re: [PATCH v2] xen-blkback: fix persistent grants negotiation

2022-07-15 Thread Oleksandr
On 15.07.22 01:44, SeongJae Park wrote: Hello all. Adding Andrii Chepurnyi to CC who have played with the use-case which required reconnect recently and faced some issues with feature_persistent handling. Persistent grants feature can be used only when both backend and the frontend su

[PATCH v2] xen-blkback: fix persistent grants negotiation

2022-07-14 Thread SeongJae Park
Persistent grants feature can be used only when both backend and the frontend supports the feature. The feature was always supported by 'blkback', but commit aac8a70db24b ("xen-blkback: add a parameter for disabling of persistent grants") has introduced a parameter for disabling it runtime. To av