On Fri, Aug 23, 2019 at 10:45:49AM +0800, Zhen Lei wrote: > v2 --> v3: > As Will Deacon's suggestion, I changed the lock type of > arm_smmu_domain.devices_lock from spinlock_t to rwlock_t, and I saw that the > performance is all right. And further use nr_ats_masters to quickly check have > no obvious effect, so I drop it.
:/ I already sent two versions of a series fixing this without any locking at all on the ->unmap() path, and you were on cc. I've also queued that stuff up. Did you not receive my patches? v1: https://lists.linuxfoundation.org/pipermail/iommu/2019-August/038306.html v2: https://lists.linuxfoundation.org/pipermail/iommu/2019-August/038374.html Queued: https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/log/?h=for-joerg/arm-smmu/smmu-v3 Will _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
