On 1 Aug 2017 22:22 +0200, from heinrich5991@xxxxxxxxx: > Aug 01 22:05:27 kernel: ata_piix 0000:00:1f.2: swiotlb buffer is full (sz: 61440 bytes) > Aug 01 22:05:27 kernel: ata_piix 0000:00:1f.2: DMA: Out of SW-IOMMU space for 61440 bytes I think that's the key. Don't know why it'd only affect usage through dm-crypt, though. [1] isn't about the exact same issue (that's someone getting very similar errors with a network card) but suggests booting with iommu=force or even iommu=off causes the errors to go away. It'll likely kill performance, but it seems like a good test. If the system is stable with such a configuration, one might expect that the drive itself doesn't have any problems with the usage. Also, there seem to be lots of reports that this happens with kernels 3.8.0 and newer, but that 3.7.x and earlier don't exhibit the same problem and [2] says a fix for another similar issue may be in 3.8.3 or possibly (as per [3]) 3.8.4. Which of course prompts the question: what kernel version are you running? And while you're at it, you might also tell us which cryptsetup version you're running; while I really doubt this is cryptsetup related, that piece of information can hardly hurt. And [4] suggests increasing the swiotlb size using the swiotlb=N kernel parameter, where N apparently is the number of 2 KiB blocks to allocate (65536 for 128 MB, 131072 for 256 MB). That feels like a stopgap measure, though, even more so than disabling IOMMU, but if all else fails... [1]: https://bbs.archlinux.org/viewtopic.php?pid=650269#p650269 [2]: https://forum.siduction.org/index.php?topic=3272.msg27986#msg27986 [3]: https://forum.siduction.org/index.php?topic=3272.msg28451#msg28451 [4]: https://www.spinics.net/lists/linux-ide/msg25119.html -- Michael Kjörling • https://michael.kjorling.se • michael@xxxxxxxxxxx “People who think they know everything really annoy those of us who know we don’t.” (Bjarne Stroustrup) _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
