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| author |   Gerd Rausch <gerd.rausch@oracle.com> | 2019-07-16 15:29:02 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-07-17 12:06:52 -0700 |
| commit | 5f33141d2fc05a2d2134ba0e7b47ce4aa88340f0 (patch) | |
| tree | f9d33d3deee13ee1c1b939495d18b238c48db70f /net/rds/ib_rdma.c | |
| parent | net/rds: Get rid of "wait_clean_list_grace" and add locking (diff) | |
| download | linux-dev-5f33141d2fc05a2d2134ba0e7b47ce4aa88340f0.tar.xz linux-dev-5f33141d2fc05a2d2134ba0e7b47ce4aa88340f0.zip | |
net/rds: Wait for the FRMR_IS_FREE (or FRMR_IS_STALE) transition after posting IB_WR_LOCAL_INV
In order to:
1) avoid a silly bouncing between "clean_list" and "drop_list"
triggered by function "rds_ib_reg_frmr" as it is releases frmr
regions whose state is not "FRMR_IS_FREE" right away.
2) prevent an invalid access error in a race from a pending
"IB_WR_LOCAL_INV" operation with a teardown ("dma_unmap_sg", "put_page")
and de-registration ("ib_dereg_mr") of the corresponding
memory region.
Signed-off-by: Gerd Rausch <gerd.rausch@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions