Hi Baoquan,
在 2023/11/28 15:34, Baoquan He 写道:
On 11/28/23 at 11:31am, Shijie Huang wrote:
在 2023/11/28 11:25, Baoquan He 写道:
On 11/27/23 at 11:18am, Shijie Huang wrote:
在 2023/11/27 10:51, Baoquan He 写道:
Hi,
On 11/27/23 at 10:07am, Huang Shijie wrote:
In memory_model.h, if CONFIG_SPARSEMEM_VMEMMAP is configed,
kernel will use vmemmap to do the __pfn_to_page/page_to_pfn,
and kernel will not use the "classic sparse" to do the
__pfn_to_page/page_to_pfn.
So export the vmemmap when CONFIG_SPARSEMEM_VMEMMAP is configed.
This makes the user applications (crash, etc) get faster
pfn_to_page/page_to_pfn operations too.
Are there Crash or makedupfile patches posted yet to make use of this?
I have patches for Crash to use the 'vmemmap', but after this patch is
merged, I will send it out.
(I think Kazu will not merge a crash patch which depends on a kernel patch
which is not merged.)
Maybe post these userspace patches too so that Kazu can evaluat if those
improvement is necessary?
No problem. I will send out them later.
Thank, Shijie. Let's wait and see if Kazu has any comment about these.
Kazu is waiting for this patch to be merged now:
https://lists.crash-utility.osci.io/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxxxxxx/thread/IJB54DIDWEJVCSCOLDYLC5NJ5AUIJZDP/
Thanks
Huang Shijie
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