bnx2x: avoid atomic allocations during initialization

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During initialization bnx2x allocates significant amounts of memory
(for rx data, rx SGEs, TPA pool) using atomic allocations.

I received a report where bnx2x failed to allocate SGEs and it had
to fall back to TPA-less operation.

Let's use GFP_KERNEL allocations during initialization, which runs
in process context. Add gfp_t parameters to functions that are used
both in initialization and in the receive path.

Use an unlikely branch in bnx2x_frag_alloc() to avoid atomic allocation
by netdev_alloc_frag(). The branch is taken several thousands of times
during initialization, but then never more. Note that fp->rx_frag_size
is never greater than PAGE_SIZE, so __get_free_page() can be used here.

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Michal Schmidt 2013-09-05 22:13:09 +02:00 • committed by David S. Miller

parent c19d65c95c

commit 996dedbafe

1 changed files with 23 additions and 15 deletions

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drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c

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