All of lore.kernel.org
 help / color / mirror / Atom feed
From: Baoquan He <bhe@redhat.com>
To: Shijie Huang <shijie@amperemail.onmicrosoft.com>, k-hagio-ab@nec.com
Cc: Huang Shijie <shijie@os.amperecomputing.com>,
	lijiang@redhat.com, akpm@linux-foundation.org, vgoyal@redhat.com,
	dyoung@redhat.com, kexec@lists.infradead.org,
	linux-kernel@vger.kernel.org, patches@amperecomputing.com
Subject: Re: [PATCH] crash_core: export vmemmap when CONFIG_SPARSEMEM_VMEMMAP is enabled
Date: Tue, 28 Nov 2023 15:34:32 +0800	[thread overview]
Message-ID: <ZWWYCLb73RYXGcpG@MiWiFi-R3L-srv> (raw)
In-Reply-To: <a7d85fee-23cd-4b85-adc6-16980b6e5e02@amperemail.onmicrosoft.com>

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@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
From: Baoquan He <bhe@redhat.com>
To: Shijie Huang <shijie@amperemail.onmicrosoft.com>, k-hagio-ab@nec.com
Cc: Huang Shijie <shijie@os.amperecomputing.com>,
	lijiang@redhat.com, akpm@linux-foundation.org, vgoyal@redhat.com,
	dyoung@redhat.com, kexec@lists.infradead.org,
	linux-kernel@vger.kernel.org, patches@amperecomputing.com
Subject: Re: [PATCH] crash_core: export vmemmap when CONFIG_SPARSEMEM_VMEMMAP is enabled
Date: Tue, 28 Nov 2023 15:34:32 +0800	[thread overview]
Message-ID: <ZWWYCLb73RYXGcpG@MiWiFi-R3L-srv> (raw)
In-Reply-To: <a7d85fee-23cd-4b85-adc6-16980b6e5e02@amperemail.onmicrosoft.com>

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.


  reply	other threads:[~2023-11-28  7:34 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-27  2:07 [PATCH] crash_core: export vmemmap when CONFIG_SPARSEMEM_VMEMMAP is enabled Huang Shijie
2023-11-27  2:07 ` Huang Shijie
2023-11-27  2:51 ` Baoquan He
2023-11-27  2:51   ` Baoquan He
2023-11-27  3:18   ` Shijie Huang
2023-11-27  3:18     ` Shijie Huang
2023-11-28  3:25     ` Baoquan He
2023-11-28  3:25       ` Baoquan He
2023-11-28  3:31       ` Shijie Huang
2023-11-28  3:31         ` Shijie Huang
2023-11-28  7:34         ` Baoquan He [this message]
2023-11-28  7:34           ` Baoquan He
2023-12-21  3:11           ` Shijie Huang
2023-12-21  3:11             ` Shijie Huang
2023-12-21  4:12 ` Baoquan He
2023-12-21  4:12   ` Baoquan He
2024-01-17  1:32   ` Shijie Huang
2024-01-17  1:32     ` Shijie Huang

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=ZWWYCLb73RYXGcpG@MiWiFi-R3L-srv \
    --to=bhe@redhat.com \
    --cc=akpm@linux-foundation.org \
    --cc=dyoung@redhat.com \
    --cc=k-hagio-ab@nec.com \
    --cc=kexec@lists.infradead.org \
    --cc=lijiang@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=patches@amperecomputing.com \
    --cc=shijie@amperemail.onmicrosoft.com \
    --cc=shijie@os.amperecomputing.com \
    --cc=vgoyal@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.