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Date: Wed, 15 Jan 2020 11:10:35 -0800 From: "Jonathan Lemon" <jonathan.lemon@...il.com> To: "Magnus Karlsson" <magnus.karlsson@...el.com> Cc: bjorn.topel@...el.com, ast@...nel.org, daniel@...earbox.net, netdev@...r.kernel.org, rgoodfel@....edu, bpf@...r.kernel.org Subject: Re: [PATCH bpf-next] xsk: support allocations of large umems On 14 Jan 2020, at 1:49, Magnus Karlsson wrote: > When registering a umem area that is sufficiently large (>1G on an > x86), kmalloc cannot be used to allocate one of the internal data > structures, as the size requested gets too large. Use kvmalloc instead > that falls back on vmalloc if the allocation is too large for kmalloc. > > Also add accounting for this structure as it is triggered by a user > space action (the XDP_UMEM_REG setsockopt) and it is by far the > largest structure of kernel allocated memory in xsk. > > Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com> > Reported-by: Ryan Goodfellow <rgoodfel@....edu> Acked-by: Jonathan Lemon <jonathan.lemon@...il.com>
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