Re: [PATCH net] net/mlx5e: Do not recycle pages from emergency reserve
From: Saeed Mahameed <hidden>
Date: 2017-01-20 10:35:50
On Thu, Jan 19, 2017 at 9:03 AM, Eric Dumazet [off-list ref] wrote:
From: Eric Dumazet <redacted>
A driver using dev_alloc_page() must not reuse a page allocated from
emergency memory reserve.
Otherwise all packets using this page will be immediately dropped,
unless for very specific sockets having SOCK_MEMALLOC bit set.
This issue might be hard to debug, because only a fraction of received
packets would be dropped.
Fixes: 4415a0319f92 ("net/mlx5e: Implement RX mapped page cache for page recycle")
Signed-off-by: Eric Dumazet <redacted>
Cc: Tariq Toukan <redacted>
Cc: Saeed Mahameed <redacted>Acked-by: Saeed Mahameed <redacted>