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. _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
