On Wed, 25 Mar 2020 12:25:59 -0700, Lionel Landwerlin wrote: > > On 25/03/2020 20:20, Ashutosh Dixit wrote: > > It is wrong to block the user thread in the next poll when OA data is > > already available which could not fit in the user buffer provided in > > the previous read. In several cases the exact user buffer size is not > > known. Blocking user space in poll can lead to data loss when the > > buffer size used is smaller than the available data. > > > > This change fixes this issue and allows user space to read all OA data > > even when using a buffer size smaller than the available data using > > multiple non-blocking reads rather than staying blocked in poll till > > the next timer interrupt. > > Looks like you found a pretty important issue. > > Can you write an IGT test case so that we don't run into it again? OK I'll see if I can come up with an IGT. Thanks! -- Ashutosh _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
