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Re: [Qemu-devel] [PATCH v4] socket: Allocating Large sized arrays to hea


From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] [PATCH v4] socket: Allocating Large sized arrays to heap
Date: Fri, 18 Mar 2016 09:35:19 +0000
User-agent: Mutt/1.5.24 (2015-08-30)

On Thu, Mar 17, 2016 at 11:50:15PM +0100, Paolo Bonzini wrote:
> 
> 
> On 17/03/2016 16:31, Pooja Dhannawat wrote:
> > 
> > 
> > On Thu, Mar 17, 2016 at 8:20 PM, Stefan Hajnoczi <address@hidden
> > <mailto:address@hidden>> wrote:
> > 
> >     On Tue, Mar 15, 2016 at 09:29:58PM +0530, Pooja Dhannawat wrote:
> >     > @@ -170,8 +170,8 @@ static void net_socket_send(void *opaque)
> >     >          s->index = 0;
> >     >          s->packet_len = 0;
> >     >          s->nc.link_down = true;
> >     > -        memset(s->buf, 0, sizeof(s->buf));
> > 
> >     This change is unrelated to allocating buf1 on the heap.  What is the
> >     purpose of this line?
> > 
> > 
> > I moved buf from stack to Heap, used g_new(), but I got your point if we
> > need to initialize it with 0 then I have to keep that one.
> > 
> > Other wise doing so it gets whatever garbage it has already.  
> 
> This is s->buf, not buf.

Exactly, they are different variables.

Stefan

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