Am 07.01.2020 um 23:39 hat Alexander Popov geschrieben: > > Did you have a look why this happens? I suppose we might be running out > > of some resources in the qtest framework becasue each send_dma_request() > > calls get_pci_device() again? > > I've spent some time on investigating, but didn't succeed. > > 1. After several hundreds of send_dma_request() calls the following assertion > in > that function fails: > assert_bit_clear(qpci_io_readb(dev, ide_bar, reg_status), BSY | DRQ); > > 2. If I comment out this assertion, the test system proceeds but eventually > stalls. > > 3. I tried to send the CMD_FLUSH_CACHE command to the device, it didn't help. > > 4. That behavior is not influenced by ide_dma_cb() code that I changed. > > I guess it would be better if that effect is examined by somebody with more > knowledge about DMA and qtest. > > > 5 seconds isn't that bad, so this shouldn't block this series, but it's > > still by far the slowest test in ide-test, so any improvement certainly > > wouldn't hurt. > > Thanks for not making that mandatory. It would take me much more time.
Ok, don't bother then. I seem to remember that I ran into something similar some time ago and found out that it was related to some integer overflow, I think during the PCI BAR mapping. This might be the same. Maybe I'll have another look later. Kevin
