Messages in this thread | | | Date | Wed, 7 Apr 2021 20:31:39 -0300 | From | Jason Gunthorpe <> | Subject | Re: [PATCH v3] IB/mlx5: Reduce max order of memory allocated for xlt update |
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On Sat, Apr 03, 2021 at 04:53:55AM +0000, Praveen Kumar Kannoju wrote: > To update xlt (during mlx5_ib_reg_user_mr()), the driver can request up to > 1 MB (order-8) memory, depending on the size of the MR. This costly > allocation can sometimes take very long to return (a few seconds). This > causes the calling application to hang for a long time, especially when the > system is fragmented. To avoid these long latency spikes, the calls the > higher order allocations need to fail faster in case they are not > available. In order to acheive this we need __GFP_NORETRY flag in the > gfp_mask before during fetching the free pages. This patch adds this flag > to the mask. > > Signed-off-by: Praveen Kumar Kannoju <praveen.kannoju@oracle.com> > Acked-by: Leon Romanovsky <leonro@nvidia.com> > --- > drivers/infiniband/hw/mlx5/mr.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-)
Applied to for-next, thanks
Jason
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