On 05-Mar-21 7:50 AM, David Marchand wrote:
On Fri, Jan 15, 2021 at 8:33 AM Nithin Dabilpuram <[email protected]> wrote:In order to save DMA entries limited by kernel both for externel memory and hugepage memory, an attempt was made to map physically contiguous memory in one go. This cannot be done as VFIO IOMMU type1 does not support partially unmapping a previously mapped memory region while Heap can request for multi page mapping and partial unmapping. Hence for going back to old method of mapping/unmapping at memseg granularity, this commit reverts commit d1c7c0cdf7ba ("vfio: map contiguous areas in one go") Also add documentation on what module parameter needs to be used to increase the per-container dma map limit for VFIO. Fixes: d1c7c0cdf7ba ("vfio: map contiguous areas in one go") Cc: [email protected] Cc: [email protected] Signed-off-by: Nithin Dabilpuram <[email protected]> Acked-by: Anatoly Burakov <[email protected]> Acked-by: David Christensen <[email protected]>There is a regression reported in bz: https://bugs.dpdk.org/show_bug.cgi?id=649 I assigned it to Anatoly for now. Nithin, can you have a loo too? Thanks.
I've responded on the bug tracker as well, but to repeat it here: this is not a regression, this is intended behavior. We cannot do anything about this.
-- Thanks, Anatoly
