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| author | Michal Schmidt <mschmidt@redhat.com> | 2014-02-25 16:04:25 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-02-26 15:27:50 -0500 |
| commit | ff2ad3071f56697920a7154ca301fd45d17d57d2 (patch) | |
| tree | e2c1746ff59c5a6c024196d119987adf69c49cba /drivers/net/ethernet/broadcom | |
| parent | 7d0445d66a7619e23257570daa794dbf1d89c2a6 (diff) | |
| download | blackbird-obmc-linux-ff2ad3071f56697920a7154ca301fd45d17d57d2.tar.gz blackbird-obmc-linux-ff2ad3071f56697920a7154ca301fd45d17d57d2.zip | |
bnx2x: save RAM in kdump kernel by using a single queue
When running in a kdump kernel, make sure to use only a single ethernet
queue even if a num_queues option in /etc/modprobe.d/*.conf would specify
otherwise. This saves memory, which tends to be scarce in kdump.
This saves about 40 MB in the kdump environment on a setup with
num_queues=8 in the config file.
Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c index 34d124998823..26bc25bd465d 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c @@ -62,6 +62,11 @@ static void bnx2x_add_all_napi(struct bnx2x *bp) static int bnx2x_calc_num_queues(struct bnx2x *bp) { int nq = bnx2x_num_queues ? : netif_get_num_default_rss_queues(); + + /* Reduce memory usage in kdump environment by using only one queue */ + if (reset_devices) + nq = 1; + nq = clamp(nq, 1, BNX2X_MAX_QUEUES(bp)); return nq; } |
