On Sun, 09 Mar 2008 14:23:13 +0300 Michael Tokarev <mjt@xxxxxxxxxx> wrote: > Just got quite.. bad situation on a production server > here. The machine locked up hard several times in a > row (required hard reboot). So I finally enabled watchdog > subsystem which helped. > > Now I see the following (over netconsole): > > DMA: Out of SW-IOMMU space for 65536 bytes at device 0000:08:07.0 > ------------[ cut here ]------------ > kernel BUG at drivers/scsi/aic7xxx/aic79xx_osm.c:1490! Seems that you was out of swiommu space (and aic79xx can't handle it though it should). This happened because: a) you produced more I/Os than swiommu can handle. b) swiommu space leaks due to bugs. If you hit this problem due to a), the following boot option might help: swiotlb=65536 The same machine run well with old kernels? If so, probably, 2.6.24 has new bugs that lead to swiommu space leak. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
