linux

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Files

Konrad Rzeszutek Wilk 3b26fd897a xen/swiotlb: Use page alignment for early buffer allocation.

commit 63a741757d upstream.

This fixes an odd bug found on a Dell PowerEdge 1850/0RC130
(BIOS A05 01/09/2006) where all of the modules doing pci_set_dma_mask
would fail with:

ata_piix 0000:00:1f.1: enabling device (0005 -> 0007)
ata_piix 0000:00:1f.1: can't derive routing for PCI INT A
ata_piix 0000:00:1f.1: BMDMA: failed to set dma mask, falling back to PIO

The issue was the Xen-SWIOTLB was allocated such as that the end of
buffer was stradling a page (and also above 4GB). The fix was
spotted by Kalev Leonid  which was to piggyback on git commit
e79f86b2ef "swiotlb: Use page alignment
for early buffer allocation" which:

	We could call free_bootmem_late() if swiotlb is not used, and
	it will shrink to page alignment.

	So alloc them with page alignment at first, to avoid lose two pages

And doing that fixes the outstanding issue.

Suggested-by: "Kalev, Leonid" <Leonid.Kalev@ca.com>
Reported-and-Tested-by: "Taylor, Neal E" <Neal.Taylor@ca.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2012-01-06 14:14:11 -08:00

xenbus

xen: use freeze/restore/thaw PM events for suspend/resume/chkpt

2011-03-16 13:42:56 -04:00

xenfs

Merge branch 'xen/xenbus' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen

2011-01-20 16:37:28 -08:00

balloon.c

xen/balloon: Move dec_totalhigh_pages() from __balloon_append() to balloon_append()

2011-03-30 11:54:51 -04:00

biomerge.c

xen: define BIOVEC_PHYS_MERGEABLE()