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Re: [Qemu-devel] [PATCH v2] hw/net/opencores_eth: Allocating Large sized
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From: |
Wei, Jiangang |
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Subject: |
Re: [Qemu-devel] [PATCH v2] hw/net/opencores_eth: Allocating Large sized arrays to heap |
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Date: |
Wed, 27 Apr 2016 03:48:44 +0000 |
On Wed, 2016-04-27 at 06:44 +0300, Max Filippov wrote:
> Hi Wei,
>
> On Wed, Apr 27, 2016 at 03:27:47AM +0000, Wei, Jiangang wrote:
> > On Wed, 2016-04-27 at 10:07 +0800, Zhou Jie wrote:
> > > static void open_eth_start_xmit(OpenEthState *s, desc *tx)
> > > {
> > > - uint8_t buf[65536];
> > > + uint8_t *buf = NULL;
> > > + uint8_t buffer[0x600];
> > Hi,
> >
> > I'm curious about 0x600.
> > How do you determine this size?
> > IMO, Max's suggestion looks more reasonable.
> > (1536 bytes, maximal frame length when HUGEN bit is not set in MODER)
>
> This is the same value. Opencores 10/100 ethernet spec uses both
> decimal and hexadecimal notation.
I got it
Thanks for your reply.
Wei