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6cc9e215eb
linux/drivers/infiniband/core
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Gal Pressman 6cc9e215eb RDMA/nldev: Add copy-on-fork attribute to get sys command 
The new attribute indicates that the kernel copies DMA pages on fork,
hence libibverbs' fork support through madvise and MADV_DONTFORK is not
needed.

The introduced attribute is always reported as supported since the kernel
has the patch that added the copy-on-fork behavior. This allows the
userspace library to identify older vs newer kernel versions.  Extra care
should be taken when backporting this patch as it relies on the fact that
the copy-on-fork patch is merged, hence no check for support is added.

Don't backport this patch unless you also have the following series:
commit 70e806e4e6 ("mm: Do early cow for pinned pages during fork() for
ptes") and commit 4eae4efa2c ("hugetlb: do early cow when page pinned on
src mm").

Fixes: 70e806e4e6 ("mm: Do early cow for pinned pages during fork() for ptes")
Fixes: 4eae4efa2c ("hugetlb: do early cow when page pinned on src mm")
Link: https://lore.kernel.org/r/20210418121025.66849-1-galpress@amazon.com
Signed-off-by: Gal Pressman <galpress@amazon.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2021-04-27 15:33:20 -03:00
..
addr.c RDMA/addr: Fix race with netevent_callback()/rdma_addr_cancel() 2020-09-30 15:29:05 -03:00
agent.c RDMA: Mark if destroy address handle is in a sleepable context 2018-12-19 16:28:03 -07:00
agent.h
cache.c RDMA/core: Correct format of braces 2021-04-12 14:56:51 -03:00
cgroup.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
cm_msgs.h RDMA/core: Add necessary spaces 2021-04-12 14:52:22 -03:00
cm_trace.c RDMA/cm: Replace pr_debug() call sites with tracepoints 2020-08-24 19:41:41 -03:00
cm_trace.h RDMA/cm: Add tracepoints to track MAD send operations 2020-08-24 19:41:41 -03:00
cm.c RDMA/core: Unify RoCE check and re-factor code 2021-04-19 12:56:53 -03:00
cma_configfs.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
cma_priv.h IB/cma: Introduce rdma_set_min_rnr_timer() 2021-04-12 19:51:48 -03:00
cma_trace.c RDMA/cma: Add trace points in RDMA Connection Manager 2020-01-07 16:10:53 -04:00
cma_trace.h RDMA/core: Move the rdma_show_ib_cm_event() macro 2020-08-24 16:01:47 -03:00
cma.c RDMA/core: Add CM to restrack after successful attachment to a device 2021-04-21 20:53:14 -03:00
core_priv.h RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
counters.c RDMA/uverbs: Refactor rdma_counter_set_auto_mode and __counter_set_mode 2021-03-26 11:52:09 -03:00
cq.c RDMA/core: Clean up cq pool mechanism 2020-12-10 15:05:17 -04:00
device.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
ib_core_uverbs.c RDMA/core: Ensure that rdma_user_mmap_entry_remove() is a fence 2020-01-25 14:48:33 -04:00
iwcm.c RDMA/iwcm: Fix iwcm work deallocation 2020-03-04 14:28:25 -04:00
iwcm.h
iwpm_msg.c RDMA/core: Correct format of block comments 2021-04-12 14:56:51 -03:00
iwpm_util.c RDMA/core/iwpm_util: Fix some param description misspellings 2021-01-19 20:33:44 -04:00
iwpm_util.h IB: Fix kernel-doc markups 2020-12-07 15:45:00 -04:00
lag.c RDMA/core: Consider flow label when building skb 2020-05-06 16:51:43 -03:00
mad_priv.h IB/mad: Change atomics to refcount API 2020-06-24 16:43:45 -03:00
mad_rmpp.c RDMA/core: Remove redundant spaces 2021-04-12 14:56:48 -03:00
mad_rmpp.h
mad.c RDMA/core: Correct format of block comments 2021-04-12 14:56:51 -03:00
Makefile RDMA/umem: Support importing dma-buf as user memory region 2021-01-20 16:07:52 -04:00
mr_pool.c Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
multicast.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
netlink.c IB/core: Avoid deadlock during netlink message handling 2019-10-24 20:49:37 -03:00
nldev.c RDMA/nldev: Add copy-on-fork attribute to get sys command 2021-04-27 15:33:20 -03:00
opa_smi.h RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
packer.c
rdma_core.c RDMA/core: Correct misspellings of two words in comments 2021-03-26 11:58:26 -03:00
rdma_core.h IB/uverbs: Introduce create/destroy QP commands over ioctl 2020-05-21 20:39:36 -03:00
restrack.c RDMA/restrack: Add support to get resource tracking for SRQ 2021-04-22 10:30:27 -03:00
restrack.h RDMA/restrack: Improve readability in task name management 2020-09-22 19:47:35 -03:00
roce_gid_mgmt.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
rw.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
sa_query.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
sa.h RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
security.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
smi.c RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
smi.h RDMA: Support more than 255 rdma ports 2021-03-26 09:31:21 -03:00
sysfs.c RDMA/core: Correct format of braces 2021-04-12 14:56:51 -03:00
trace.c RDMA/core: Clean up tracepoint headers 2020-07-06 14:54:46 -03:00
ucma.c RDMA/core: Add necessary spaces 2021-04-12 14:52:22 -03:00
ud_header.c RDMA/core: Use sizeof_field() helper 2020-05-27 13:46:05 -03:00
umem_dmabuf.c RDMA/mlx5: Consolidate MR destruction to mlx5_ib_dereg_mr() 2021-03-11 20:03:25 -04:00
umem_odp.c IB/core: Enable ODP sync without faulting 2020-10-01 16:44:05 -03:00
umem.c RDMA/core: Print the function name by __func__ instead of an fixed string 2021-04-12 14:52:22 -03:00
user_mad.c RDMA/core: Remove redundant spaces 2021-04-12 14:56:48 -03:00
uverbs_cmd.c RDMA/core: Remove redundant spaces 2021-04-12 14:56:48 -03:00
uverbs_ioctl.c IB/core: Split uverbs_get_const/default to consider target type 2021-03-11 20:20:36 -04:00
uverbs_main.c RDMA: Convert sysfs device * show functions to use sysfs_emit() 2020-10-26 19:53:21 -03:00
uverbs_marshall.c
uverbs_std_types_async_fd.c RDMA/core: Make FD destroy callback void 2020-11-12 12:32:17 -04:00
uverbs_std_types_counters.c RDMA/core: Postpone uobject cleanup on failure till FD close 2020-11-12 12:32:17 -04:00
uverbs_std_types_cq.c RDMA/core: Postpone uobject cleanup on failure till FD close 2020-11-12 12:32:17 -04:00
uverbs_std_types_device.c RDMA/uverbs: Fix incorrect variable type 2020-12-10 15:05:17 -04:00
uverbs_std_types_dm.c RDMA/core: Postpone uobject cleanup on failure till FD close 2020-11-12 12:32:17 -04:00
uverbs_std_types_flow_action.c RDMA/core: Postpone uobject cleanup on failure till FD close 2020-11-12 12:32:17 -04:00
uverbs_std_types_mr.c RDMA/uverbs: Add uverbs command for dma-buf based MR registration 2021-01-20 16:07:52 -04:00
uverbs_std_types_qp.c RDMA/restrack: Support all QP types 2020-11-27 11:38:46 -04:00
uverbs_std_types_srq.c RDMA/core: Postpone uobject cleanup on failure till FD close 2020-11-12 12:32:17 -04:00
uverbs_std_types_wq.c RDMA/core: Postpone uobject cleanup on failure till FD close 2020-11-12 12:32:17 -04:00
uverbs_std_types.c RDMA/core: Make FD destroy callback void 2020-11-12 12:32:17 -04:00
uverbs_uapi.c RDMA/core Remove uverbs_ex_cmd_mask 2020-10-26 19:27:59 -03:00
uverbs.h IB/uverbs: Extend CQ to get its own asynchronous event FD 2020-05-21 20:34:53 -03:00
verbs.c RDMA/restrack: Add support to get resource tracking for SRQ 2021-04-22 10:30:27 -03:00