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Gentoo's Bugzilla – Attachment 278727 Details for
Bug 373109
>=sys-kernel/gentoo-sources-2.6.39-r2: Network copy freezes system
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bisect 2.6.391 and 2.6.39.2
git_bisect.txt (text/plain), 3.85 KB, created by
Marcus Becker
on 2011-06-30 18:27:47 UTC
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Description:
bisect 2.6.391 and 2.6.39.2
Filename:
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Creator:
Marcus Becker
Created:
2011-06-30 18:27:47 UTC
Size:
3.85 KB
patch
obsolete
>Bisecting: 44 revisions left to test after this (roughly 6 steps) >[a4d37345244dea111a49dda25cc30b2ae7dab05c] x86/amd-iommu: Use only per-device dma_ops > >Bisecting: 22 revisions left to test after this (roughly 5 steps) >[0db9466ed48263ab2951e89240b482912695c4a6] iwl4965: fix 5GHz operation >Linux disi-bigtop 2.6.39.1-00045-ga4d3734 #1 SMP Thu Jun 30 18:29:47 BST 2011 x86_64 Intel(R) Core(TM) i7-2820QM CPU @ 2.30GHz GenuineIntel GNU/Linux > >Bisecting: 10 revisions left to test after this (roughly 4 steps) >[646543453327a2b85083f4012d3bbeb5dabdabb8] arch/tile: allocate PCI IRQs later in boot >Linux disi-bigtop 2.6.39.1-00022-g0db9466 #2 SMP Thu Jun 30 18:41:17 BST 2011 x86_64 Intel(R) Core(TM) i7-2820QM CPU @ 2.30GHz GenuineIntel GNU/Linux > >Bisecting: 5 revisions left to test after this (roughly 3 steps) >[3a2bc9ae5ee092a0db8aa07d695e15b14a3fe2a4] intel-iommu: Speed up processing of the identity_mapping function >Linux disi-bigtop 2.6.39.1-00011-g6465434 #3 SMP Thu Jun 30 18:47:56 BST 2011 x86_64 Intel(R) Core(TM) i7-2820QM CPU @ 2.30GHz GenuineIntel GNU/Linux > >Bisecting: 2 revisions left to test after this (roughly 2 steps) >[b8f794de1463ab32ed90c97ad6edbcecd931abed] intel-iommu: Remove Host Bridge devices from identity mapping >Linux disi-bigtop 2.6.39.1-00005-g3a2bc9a #4 SMP Thu Jun 30 18:55:05 BST 2011 x86_64 Intel(R) Core(TM) i7-2820QM CPU @ 2.30GHz GenuineIntel GNU/Linux > >Bisecting: 0 revisions left to test after this (roughly 1 step) >[80ebe0ace73cb376f66bdeeb92f4e7b5d4a3f8fb] intel-iommu: Use coherent DMA mask when requested >Linux disi-bigtop 2.6.39.1-00008-gb8f794d #5 SMP Thu Jun 30 19:04:49 BST 2011 x86_64 Intel(R) Core(TM) i7-2820QM CPU @ 2.30GHz GenuineIntel GNU/Linux > >Bisecting: 0 revisions left to test after this (roughly 0 steps) >[87cc4d1e3e05af38c7c51323a3d86fe2572ab033] intel-iommu: Dont cache iova above 32bit >Linux disi-bigtop 2.6.39.1-00007-g80ebe0a #6 SMP Thu Jun 30 19:12:37 BST 2011 x86_64 Intel(R) Core(TM) i7-2820QM CPU @ 2.30GHz GenuineIntel GNU/Linux > >87cc4d1e3e05af38c7c51323a3d86fe2572ab033 is the first bad commit >commit 87cc4d1e3e05af38c7c51323a3d86fe2572ab033 >Author: Chris Wright <chrisw@sous-sol.org> >Date: Sat May 28 13:15:04 2011 -0500 > > intel-iommu: Dont cache iova above 32bit > > commit 1c9fc3d11b84fbd0c4f4aa7855702c2a1f098ebb upstream. > > Mike Travis and Mike Habeck reported an issue where iova allocation > would return a range that was larger than a device's dma mask. > > https://lkml.org/lkml/2011/3/29/423 > > The dmar initialization code will reserve all PCI MMIO regions and copy > those reservations into a domain specific iova tree. It is possible for > one of those regions to be above the dma mask of a device. It is typical > to allocate iovas with a 32bit mask (despite device's dma mask possibly > being larger) and cache the result until it exhausts the lower 32bit > address space. Freeing the iova range that is >= the last iova in the > lower 32bit range when there is still an iova above the 32bit range will > corrupt the cached iova by pointing it to a region that is above 32bit. > If that region is also larger than the device's dma mask, a subsequent > allocation will return an unusable iova and cause dma failure. > > Simply don't cache an iova that is above the 32bit caching boundary. > > Reported-by: Mike Travis <travis@sgi.com> > Reported-by: Mike Habeck <habeck@sgi.com> > Acked-by: Mike Travis <travis@sgi.com> > Tested-by: Mike Habeck <habeck@sgi.com> > Signed-off-by: Chris Wright <chrisw@sous-sol.org> > Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> > Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> > >:040000 040000 fdd2ca77df8333e2888f326c7ea26b6d7dbcc2c1 fe5353f31fc5d54a5068517e07c533c2e59d9f42 M drivers >Linux disi-bigtop 2.6.39.1-00006-g87cc4d1 #7 SMP Thu Jun 30 19:18:42 BST 2011 x86_64 Intel(R) Core(TM) i7-2820QM CPU @ 2.30GHz GenuineIntel GNU/Linux
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bug 373109
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