04.09.2020 12:05, Joerg Roedel пишет: > On Fri, Aug 14, 2020 at 07:22:52PM +0300, Dmitry Osipenko wrote: >> The mapping operations of the Tegra SMMU driver are subjected to a race >> condition issues because SMMU Address Space isn't allocated and freed >> atomically, while it should be. This patch makes the mapping operations >> atomic, it fixes an accidentally released Host1x Address Space problem >> which happens while running multiple graphics tests in parallel on >> Tegra30, i.e. by having multiple threads racing with each other in the >> Host1x's submission and completion code paths, performing IOVA mappings >> and unmappings in parallel. >> >> Cc: <stable@xxxxxxxxxxxxxxx> >> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> > > Thierry, does this change look good to you? > Hello Joerg and Thierry, Please take into account that there is a v5 now that I sent out a day ago, it's more optimized version and supports both atomic and non-atomic GFP flags for the mapping operation.
