Re: [Xen-devel][PV-ops][PATCH] Netback: Fix PV network issue for netback multiple threads patchset

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> On 10.06.10 at 13:48, "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx> wrote:
> Hi Jeremy,
> 
> The attached patch should fix the PV network issue after applying the 
> netback multiple threads patchset.
> 
> This bug comes from the version upgrade when resending my patchset last 
> time. 
> 
> In patch v1 & v2, I used kzalloc() to allocate memory, so there is no 
> problem.
> In patch v3, I changed it to "__get_free_pages(GFP_KERNEL | __GFP_ZERO, 
> order)", so there is also no problem.
> However in patch v4, when modified it to vmalloc according to the comments, 
> memset(0) is missing. Sorry for that.

A perhaps better alternative would be to use

__vmalloc(..., GFP_KERNEL|__GFP_HIGHMEM|__GFP_ZERO, PAGE_KERNEL);

Jan


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