Linus Torvalds writes:
> So I'd really like to finish this. Even if we end up with a hack or
> two in signal handling that we can hopefully fix up later by having
> vhost fix up some of its current assumptions.
The real sticky widget for me is how to handle one of these processes
coredumping.
On Fri, May 26, 2023 at 2:39 PM Jason Wang wrote:
>
> On Fri, May 26, 2023 at 1:46 PM Liang Chen wrote:
> >
> > "private" of buffer page is currently used for big mode to chain pages.
> > But in mergeable mode, that offset of page could mean something else,
> > e.g. when page_pool page is used in
On Fri, May 26, 2023 at 2:51 PM Jason Wang wrote:
>
> On Fri, May 26, 2023 at 1:46 PM Liang Chen wrote:
> >
> > The implementation at the moment uses one page per packet in both the
> > normal and XDP path.
>
> It's better to explain why we need a page pool and how it can help the
> performance.
On Fri, May 26, 2023 at 3:06 PM Jason Wang wrote:
>
> On Fri, May 26, 2023 at 1:47 PM Liang Chen wrote:
> >
> > Adding a DMA pre-handler that utilizes page pool for managing DMA mappings.
> > When IOMMU is enabled, turning on the page_pool_dma_map module parameter to
> > select page pool for DMA
On Fri, May 26, 2023 at 4:29 PM Horatiu Vultur
wrote:
>
> The 05/26/2023 13:46, Liang Chen wrote:
>
> Hi Liang,
>
> >
> > To further enhance performance, implement page pool fragmentation
> > support and introduce a module parameter to enable or disable it.
> >
> > In single-core vm testing enviro
On Sat, May 27, 2023 at 2:49 AM Eric W. Biederman wrote:
>
> The real sticky widget for me is how to handle one of these processes
> coredumping. It really looks like it will result in a reliable hang.
Well, if *that* is the main worry, I think that's trivial enough to deal with.
In particular,
Linus Torvalds writes:
> On Sat, May 27, 2023 at 2:49 AM Eric W. Biederman
> wrote:
>>
>> The real sticky widget for me is how to handle one of these processes
>> coredumping. It really looks like it will result in a reliable hang.
>
> Well, if *that* is the main worry, I think that's trivial
On Sat, May 27, 2023 at 6:17 PM Eric W. Biederman wrote:
>
> It seems like a good approach for including in the -rc series.
> I think the change should look more like my change below.
I have no objections. My patch was a fairly "hack and slash" thing to
just disassociate the IO workers entirely f
Mike Christie writes:
> On 5/23/23 7:15 AM, Oleg Nesterov wrote:
>>
>> Now the main question. Whatever we do, SIGKILL/SIGSTOP/etc can come right
>> before we call work->fn(). Is it "safe" to run this callback with
>> signal_pending() or fatal_signal_pending() ?
>
> The questions before this one
On Fri, May 26, 2023 at 01:46:17PM +0800, Liang Chen wrote:
> "private" of buffer page is currently used for big mode to chain pages.
> But in mergeable mode, that offset of page could mean something else,
> e.g. when page_pool page is used instead. So excluding mergeable mode to
> avoid such a pro
On Fri, May 26, 2023 at 01:46:18PM +0800, Liang Chen wrote:
> The implementation at the moment uses one page per packet in both the
> normal and XDP path. In addition, introducing a module parameter to enable
> or disable the usage of page pool (disabled by default).
>
> In single-core vm testing
On Fri, May 26, 2023 at 01:46:19PM +0800, Liang Chen wrote:
> To further enhance performance, implement page pool fragmentation
> support and introduce a module parameter to enable or disable it.
>
> In single-core vm testing environments, there is an additional performance
> gain observed in the
On Sat, May 27, 2023 at 12:11:25AM +0800, kernel test robot wrote:
> Hi Liang,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on net-next/main]
>
> url:
> https://github.com/intel-lab-lkp/linux/commits/Liang-Chen/virtio_net-Add-page_pool-support-to-impro
On Fri, May 26, 2023 at 02:38:54PM +0800, Jason Wang wrote:
> On Fri, May 26, 2023 at 1:46 PM Liang Chen wrote:
> >
> > "private" of buffer page is currently used for big mode to chain pages.
> > But in mergeable mode, that offset of page could mean something else,
> > e.g. when page_pool page is
On Sat, May 27, 2023 at 08:35:01PM +0800, Liang Chen wrote:
> On Fri, May 26, 2023 at 2:51 PM Jason Wang wrote:
> >
> > On Fri, May 26, 2023 at 1:46 PM Liang Chen
> > wrote:
> > >
> > > The implementation at the moment uses one page per packet in both the
> > > normal and XDP path.
> >
> > It's
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