linux-stable.git/net/rds, branch v5.6

net/rds: Track user mapped pages through special API

2020-02-17T02:37:09+00:00

Convert net/rds to use the newly introduces pin_user_pages() API,
which properly sets FOLL_PIN. Setting FOLL_PIN is now required for
code that requires tracking of pinned pages.

Note that this effectively changes the code's behavior: it now
ultimately calls set_page_dirty_lock(), instead of set_page_dirty().
This is probably more accurate.

As Christoph Hellwig put it, "set_page_dirty() is only safe if we are
dealing with a file backed page where we have reference on the inode it
hangs off." [1]

[1] https://lore.kernel.org/r/20190723153640.GB720@lst.de

Cc: Hans Westgaard Ry 
Cc: Santosh Shilimkar 
Signed-off-by: Leon Romanovsky 
Signed-off-by: John Hubbard 
Acked-by: Santosh Shilimkar 
Signed-off-by: David S. Miller

net/rds: Use prefetch for On-Demand-Paging MR

2020-01-18T09:48:19+00:00

Try prefetching pages when using On-Demand-Paging MR using
ib_advise_mr.

Signed-off-by: Hans Westgaard Ry 
Acked-by: Santosh Shilimkar 
Signed-off-by: Leon Romanovsky

net/rds: Handle ODP mr registration/unregistration

2020-01-18T09:48:19+00:00

On-Demand-Paging MRs are registered using ib_reg_user_mr and
unregistered with ib_dereg_mr.

Signed-off-by: Hans Westgaard Ry 
Acked-by: Santosh Shilimkar 
Signed-off-by: Leon Romanovsky

net/rds: Detect need of On-Demand-Paging memory registration

2020-01-16T14:15:25+00:00

Add code to check if memory intended for RDMA is FS-DAX-memory. RDS
will fail with error code EOPNOTSUPP if FS-DAX-memory is detected.

Signed-off-by: Hans Westgaard Ry 
Acked-by: Santosh Shilimkar 
Signed-off-by: Leon Romanovsky

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2019-11-17T05:51:42+00:00

Lots of overlapping changes and parallel additions, stuff
like that.

Signed-off-by: David S. Miller

rds: ib: update WR sizes when bringing up connection

2019-11-16T20:59:08+00:00

Currently WR sizes are updated from rds_ib_sysctl_max_send_wr and
rds_ib_sysctl_max_recv_wr when a connection is shut down. As a result,
a connection being down while rds_ib_sysctl_max_send_wr or
rds_ib_sysctl_max_recv_wr are updated, will not update the sizes when
it comes back up.

Move resizing of WRs to rds_ib_setup_qp so that connections will be setup
with the most current WR sizes.

Signed-off-by: Dag Moxnes 
Acked-by: Santosh Shilimkar 
Signed-off-by: David S. Miller

net/rds: Remove unnecessary null check

2019-10-17T19:23:03+00:00

Null check before dma_pool_destroy is redundant, so remove it.
This is detected by coccinelle.

Signed-off-by: YueHaibing 
Signed-off-by: David S. Miller

net/rds: Add missing include file

2019-10-06T16:34:10+00:00

Fix build error:

net/rds/ib_cm.c: In function rds_dma_hdrs_alloc:
net/rds/ib_cm.c:475:13: error: implicit declaration of function dma_pool_zalloc; did you mean mempool_alloc? [-Werror=implicit-function-declaration]
   hdrs[i] = dma_pool_zalloc(pool, GFP_KERNEL, &hdr_daddrs[i]);
             ^~~~~~~~~~~~~~~
             mempool_alloc

net/rds/ib.c: In function rds_ib_dev_free:
net/rds/ib.c:111:3: error: implicit declaration of function dma_pool_destroy; did you mean mempool_destroy? [-Werror=implicit-function-declaration]
   dma_pool_destroy(rds_ibdev->rid_hdrs_pool);
   ^~~~~~~~~~~~~~~~
   mempool_destroy

Reported-by: Hulk Robot 
Fixes: 9b17f5884be4 ("net/rds: Use DMA memory pool allocation for rds_header")
Signed-off-by: YueHaibing 
Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2019-10-05T20:37:23+00:00

net/rds: Use DMA memory pool allocation for rds_header

2019-10-03T19:11:08+00:00

Currently, RDS calls ib_dma_alloc_coherent() to allocate a large piece
of contiguous DMA coherent memory to store struct rds_header for
sending/receiving packets.  The memory allocated is then partitioned
into struct rds_header.  This is not necessary and can be costly at
times when memory is fragmented.  Instead, RDS should use the DMA
memory pool interface to handle this.  The DMA addresses of the pre-
allocated headers are stored in an array.  At send/receive ring
initialization and refill time, this arrary is de-referenced to get
the DMA addresses.  This array is not accessed at send/receive packet
processing.

Suggested-by: Håkon Bugge 
Signed-off-by: Ka-Cheong Poon 
Acked-by: Santosh Shilimkar 
Signed-off-by: David S. Miller