Re: Not enough memory when entering CLI

The machine has 2GB memory.

I run with the patch, same results a reset happens and I could not see error
message on the screen.

Thanks,

Itay

On Sun, Oct 18, 2009 at 4:31 PM, Stefan Hajnoczi <[email protected]> wrote:

> On Sat, Oct 17, 2009 at 12:52 PM, Itay Gazit <[email protected]> wrote:
> > on some machines, when trying to enter CLI the drivers get stuck or even
> > reboot the machine.
>
> How much RAM do these machines have?
>
> > How can we ensure the memory region reported by the BIOS are large enough
> to
> > fit Mellanox devices?
> > How can we ensure that umalloc command will fail when we ask for memory
> > region which is out of range?
>
> Do you get a clean error when running with the patch below?
>
> (Build with "make DEBUG=mtnic bin/mtnic.usb" to see the debug output.)
>
> Stefan
>
> diff --git a/src/drivers/net/mtnic.c b/src/drivers/net/mtnic.c
> index d7ee8d2..7b58698 100644
> --- a/src/drivers/net/mtnic.c
> +++ b/src/drivers/net/mtnic.c
> @@ -544,6 +544,7 @@ out:
>  static int
>  mtnic_map_cmd(struct mtnic *mtnic, u16 op, struct mtnic_pages pages)
>  {
> +       userptr_t ubuf;
>        unsigned int j;
>        u32 addr;
>        unsigned int len;
> @@ -553,8 +554,15 @@ mtnic_map_cmd(struct mtnic *mtnic, u16 op, struct
> mtnic_pages pages)
>
>        memset(page_arr, 0, PAGE_SIZE);
>
> +       ubuf = umalloc(PAGE_SIZE * (pages.num + 1));
> +       if (ubuf == UNULL) {
> +               DBG("MTNIC %p umalloc of 0x%x bytes failed\n",
> +                   mtnic, PAGE_SIZE * (pages.num + 1));
> +               return -ENOMEM;
> +       }
> +
>        len = PAGE_SIZE * pages.num;
> -       pages.buf = (u32 *)umalloc(PAGE_SIZE * (pages.num + 1));
> +       pages.buf = (u32 *)ubuf;
>        addr = PAGE_SIZE + ((virt_to_bus(pages.buf) & 0xfffff000) +
> PAGE_SIZE);
>        DBG("Mapping pages: size: %x address: %p\n", pages.num, pages.buf);
>

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