svcrdma: Add gfp flags to svc_rdma_post_recv()

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svc_rdma_post_recv() allocates pages for receive buffers on-demand.
It uses GFP_KERNEL so the allocator tries hard, and may sleep. But
I'm about to add a call to svc_rdma_post_recv() from a function
that may not sleep.

Since all svc_rdma_post_recv() call sites can tolerate its failure,
allow it to fail if the page allocator returns nothing. Longer term,
receive buffers, being a finite resource per-connection, should be
pre-allocated and re-used.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Bruce Fields <bfields@fieldses.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

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Chuck Lever 2016-01-07 14:49:37 -05:00 • committed by Doug Ledford

parent 71810ef327

commit 39b09a1a12

3 changed files with 7 additions and 5 deletions

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include/linux/sunrpc/svc_rdma.h

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