Re: [PATCH net-next] tcp: forbid direct reclaim if MSG_DONTWAIT is set in send path

[Eric Dumazet]

On Tue, Oct 9, 2018 at 7:58 AM Eric Dumazet <edumazet@xxxxxxxxxx> wrote:
>

> We do not add bloat in the kernel if no application is ever going to
> use it, especially in the TCP fast path.
>

BTW, are you willing to change all memory allocations in the kernel as well ?

Let say an application is using a system call providing a pathname
(open(), stat(), ...), how this system call
is going to ask the kernel for no direct reclaim ?

Even allocating a socket with socket() or accept() has no ability to
avoid direct reclaim.

So tcp_sendmsg() is only the tip of the iceberg.