On Wed 2015-08-05 17:11:48, Jiri Slaby wrote: > On 08/05/2015, 01:52 PM, Jiri Slaby wrote: > >> Yes, I see: > >> sdhci-pci 0000:02:00.0: swiotlb buffer is full (sz: 65536 bytes) > >> after some time. The driver falls back to non-DMA transfers after that. > >> It also generates a warning about that: > >> WARNING: CPU: 0 PID: 0 at drivers/mmc/host/sdhci.c:857 > >> sdhci_prepare_data+0x8ec/0x900 [sdhci]() > > > > I am attaching a debug patch and a debug log. You can see where > > 0x00000000fffb0000 and 0x00000000fffe0000 is leaked. It is when 'invalid > > cookie' error happens. > > And you could see the cookie handling is totally bogus. > > With this rewrite, I no longer see the problems. Could you confirm it > still does the good job with respect to performance -- the numbers you > mentioned in your commit. > > Ulf, what do you think about the attached patch? (Do not look at the > commented info prints.) Umm. Normally we inline patches for easier comments. Attaching it with type of _mailbox_ is not really good. Pavel [-- Attachment #2: fix.patch --] [-- Type: application/mbox, Encoding: base64, Size: 8.2K --] -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
