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| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2017-10-02 12:39:11 -0600 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2017-10-02 12:39:11 -0600 |
| commit | 5c2fefd882d3666f11447e3e0fe663a8a7f64cc9 (patch) | |
| tree | c35a2f80c9b27b5ee1dfff0d834a3ee70cd262f0 /drivers/vfio | |
| parent | cf0d53ba4947aad6e471491d5b20a567cbe92e56 (diff) | |
| download | linux-5c2fefd882d3666f11447e3e0fe663a8a7f64cc9.tar.gz linux-5c2fefd882d3666f11447e3e0fe663a8a7f64cc9.tar.bz2 linux-5c2fefd882d3666f11447e3e0fe663a8a7f64cc9.zip | |
vfio/spapr: Add cond_resched() for huge updates
Clearing very big IOMMU tables can trigger soft lockups. This adds
cond_resched() to allow the scheduler to do context switching when
it decides to.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/vfio_iommu_spapr_tce.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c index 63112c36ab2d..759a5bdd40e1 100644 --- a/drivers/vfio/vfio_iommu_spapr_tce.c +++ b/drivers/vfio/vfio_iommu_spapr_tce.c @@ -507,6 +507,8 @@ static int tce_iommu_clear(struct tce_container *container, enum dma_data_direction direction; for ( ; pages; --pages, ++entry) { + cond_resched(); + direction = DMA_NONE; oldhpa = 0; ret = iommu_tce_xchg(tbl, entry, &oldhpa, &direction); |