Jason Gunthorpe 9dc775e7f5 RDMA/odp: Lift umem_mutex out of ib_umem_odp_unmap_dma_pages() ... This fixes a race of the form: CPU0 CPU1 mlx5_ib_invalidate_range() mlx5_ib_invalidate_range() // This one actually makes npages == 0 ib_umem_odp_unmap_dma_pages() if (npages == 0 && !dying) // This one does nothing ib_umem_odp_unmap_dma_pages() if (npages == 0 && !dying) dying = 1; dying = 1; schedule_work(&umem_odp->work); // Double schedule of the same work schedule_work(&umem_odp->work); // BOOM npages and dying must be read and written under the umem_mutex lock. Since whenever ib_umem_odp_unmap_dma_pages() is called mlx5 must also call mlx5_ib_update_xlt, and both need to be done in the same locking region, hoist the lock out of unmap. This avoids an expensive double critical section in mlx5_ib_invalidate_range(). Fixes: 81713d3788 ("IB/mlx5: Add implicit MR support") Link: https://lore.kernel.org/r/20191001153821.23621-4-jgg@ziepe.ca Reviewed-by: Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>		2019-10-04 15:54:21 -03:00
..
addr.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-09-28 17:47:33 -07:00
agent.c
agent.h
cache.c
cgroup.c
cm_msgs.h
cm.c	RDMA/cm: Fix memory leak in cm_add/remove_one	2019-10-04 14:58:31 -03:00
cma_configfs.c
cma_priv.h
cma.c	RDMA/iwcm: Fix a lock inversion issue	2019-10-01 12:11:50 -03:00
core_priv.h
counters.c
cq.c
device.c	RDMA/core: Fix use after free and refcnt leak on ndev in_device in iwarp_query_port	2019-10-01 11:31:27 -03:00
fmr_pool.c
iwcm.c
iwcm.h
iwpm_msg.c
iwpm_util.c
iwpm_util.h
mad_priv.h
mad_rmpp.c
mad_rmpp.h
mad.c
Makefile
mr_pool.c
multicast.c
netlink.c
nldev.c	RDMA/nldev: Reshuffle the code to avoid need to rebind QP in error path	2019-10-04 15:29:55 -03:00
opa_smi.h
packer.c
rdma_core.c
rdma_core.h
restrack.c
restrack.h
roce_gid_mgmt.c
rw.c
sa_query.c
sa.h
security.c	IB/core: Fix wrong iterating on ports	2019-10-04 15:50:27 -03:00
smi.c
smi.h
sysfs.c
ucma.c
ud_header.c
umem_odp.c	RDMA/odp: Lift umem_mutex out of ib_umem_odp_unmap_dma_pages()	2019-10-04 15:54:21 -03:00
umem.c	mm/gup: add make_dirty arg to put_user_pages_dirty_lock()	2019-09-24 15:54:08 -07:00
user_mad.c
uverbs_cmd.c
uverbs_ioctl.c
uverbs_main.c
uverbs_marshall.c
uverbs_std_types_counters.c
uverbs_std_types_cq.c
uverbs_std_types_device.c
uverbs_std_types_dm.c
uverbs_std_types_flow_action.c
uverbs_std_types_mr.c
uverbs_std_types.c
uverbs_uapi.c
uverbs.h
verbs.c