Turns out if I turn off xen (machine is running as a dom0 (xen host, not inside a vm)), it all works perfectly. I assume this issue isn't limited to my new dual express 2 card?? Any suggestions where to look? James > -----Original Message----- > From: linux-media-owner@xxxxxxxxxxxxxxx [mailto:linux-media- > owner@xxxxxxxxxxxxxxx] On Behalf Of James Harper > Sent: Sunday, 8 June 2014 8:36 PM > To: René; linux-media@xxxxxxxxxxxxxxx > Subject: RE: fusion hdtv dual express 2 (working, kind of) > > One thing I just noticed, it's always the same pages in each buffer that is 'lost' > (in "find_next_packet"). If I printk some details, the 'lost' parts are always > some multiple of 4k in size (with allowance for 188 byte packet). > > printk("find_next_packet() lost %p %d-%d (%d)\n", buf, start, pos, lost); > > and then formatting the output through sort -u to eliminate duplicates > produces output like: > > ffffc90002966000 0-24064 (24064) > ffffc90002987000 0-4136 (4136) > ffffc90002990000 0-4136 (4136) > ffffc90002990000 20492-24064 (3572) > ffffc90002999000 0-4136 (4136) > ffffc900029a2000 0-4136 (4136) > ffffc900029ab000 12408-20492 (8084) > ffffc900029b4000 4136-12408 (8272) > ffffc900029bd000 12408-20492 (8084) > ffffc900029c6000 0-4136 (4136) > ffffc900029c6000 20492-24064 (3572) > ffffc900029cf000 20492-24064 (3572) > ffffc900029d8000 16544-20492 (3948) > ffffc900029d8000 4136-12408 (8272) > ffffc900029ea000 0-4136 (4136) > > so taking ffffc900029d8000 as an example, the second and third pages have > no data in them, and neither does the fifth page. This happens every time > ffffc900029d8000 is accessed. > > So I'm guessing that the sg list hasn't been programmed correctly or > something... does that sound right? I guess I'll print out the pfn's to see if > there is a pattern there next... > > James > > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
