netdev - Re: [PATCH v3 2/5] SUNRPC: Send RPC message on TCP with a single sock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZL58WsAxz3Gj/Jlt@tissot.1015granger.net>
Date: Mon, 24 Jul 2023 09:27:54 -0400
From: Chuck Lever <chuck.lever@...cle.com>
To: David Howells <dhowells@...hat.com>
Cc: Chuck Lever <cel@...nel.org>, linux-nfs@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH v3 2/5] SUNRPC: Send RPC message on TCP with a single
 sock_sendmsg() call

On Mon, Jul 24, 2023 at 10:58:50AM +0100, David Howells wrote:
> Chuck Lever <cel@...nel.org> wrote:
> 
> > +	buf = page_frag_alloc(&svsk->sk_frag_cache, sizeof(marker),
> > +			      GFP_KERNEL);
> 
> Is this SMP-safe?  page_frag_alloc() does no locking.

Note that svc_tcp_sendto() takes xprt->xpt_mutex. There can be only
one thread (per svsk) running in svc_tcp_sendmsg() at a time.


-- 
Chuck Lever