* Chris Wright (chr...@sous-sol.org) wrote: > > On Wed, 13 Jul 2011 14:32:42 GMT > > bugzilla-dae...@bugzilla.kernel.org wrote: > > > https://bugzilla.kernel.org/show_bug.cgi?id=39312 > > > > > > URL: https://bugs.gentoo.org/show_bug.cgi?id=373109 > > > Summary: intel-iommu: Dont cache iova above 32bit - network > > > copy freezes system > > > Product: Drivers > > > Version: 2.5 > > > Kernel Version: 2.6.39.2 > > > Platform: All > > > OS/Version: Linux > > > Tree: Mainline > > > Status: NEW > > > Severity: normal > > > Priority: P1 > > > Component: Other > > > AssignedTo: drivers_ot...@kernel-bugs.osdl.org > > > ReportedBy: marcus.d...@gmail.com > > > Regression: No > > > > > > > > > Created an attachment (id=65422) > > > --> (https://bugzilla.kernel.org/attachment.cgi?id=65422) > > > dmesg > > Can you send a dmesg from boot, and an lspci?
Two things worth trying: 1) boot with intel_iommu=strict (to disable batching of unmaps, should keep the number of outstanding mappings much lower) 2) boot with intel_iommu=forcedac (to disable the current behaviour which tries to map < 32bit, then if that fails, maps >32bit). The hangs sounds like the iova allocation is looping excessively under spin_lock_irqsave() _______________________________________________ stable mailing list stable@linux.kernel.org http://linux.kernel.org/mailman/listinfo/stable
