04.09.2020 12:19, Dmitry Osipenko пишет: > 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. > https://patchwork.ozlabs.org/project/linux-tegra/patch/20200901203730.27865-1-digetx@xxxxxxxxx/
