All of lore.kernel.org
 help / color / mirror / Atom feed
From: Mike Travis <travis@sgi.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Dhaval Giani <dhaval@linux.vnet.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org
Subject: Re: RFC [PATCH] x86: introduce nr_irqs for 64bit
Date: Wed, 30 Jul 2008 05:58:21 -0700	[thread overview]
Message-ID: <4890656D.4080906@sgi.com> (raw)
In-Reply-To: <20080730100926.GA10431@elte.hu>

Ingo Molnar wrote:
> * Yinghai Lu <yhlu.kernel@gmail.com> wrote:
> 
>> add DEFINE_DYN_ARRAY for dynamical array support
>>
>> todo:
>> 1. convert x86 32bit and other arch
>> 2. nr_irqs auto probe via acpi_oem_check?
>>
>> Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
> 
> wonderful!
> 
> I have one main structural suggestion: could we please keep the NR_IRQS 
> name, and just change it to dynamic on x86? NR_IRQS is used in 540 
> places in the kernel, there's no point in touching all that code.

Good thought.
> 
> Also add an CONFIG_ARCH_HAS_DYNAMIC_NR_IRQS switch, define it in 
> arch/x86/Kconfig and use it in include/linux/irq.h.

It could also revert DEFINE_DYN_ARRAY to a fixed array for more
compact code in small machines.

Thanks,
Mike
> 
> This will create far less migration pain than the widespread rename. 
> That will also solve the "what about the other architectures" question.
> 
> 	Ingo


  parent reply	other threads:[~2008-07-30 12:58 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-07-29 21:14 [PATCH] x86: 64bit support more than 256 irq v2 Yinghai Lu
2008-07-29 22:16 ` Yinghai Lu
2008-07-29 23:22 ` Eric W. Biederman
2008-07-30  4:38 ` RFC [PATCH] x86: introduce nr_irqs for 64bit Yinghai Lu
2008-07-30 10:09   ` Ingo Molnar
2008-07-30 10:16     ` Yinghai Lu
2008-07-30 12:58     ` Mike Travis [this message]
2008-07-30 10:11   ` [PATCH] x86: introduce nr_irqs for 64bit v2 Yinghai Lu
2008-07-30 19:10     ` [PATCH 0/7] dyn_array support Yinghai Lu
2008-07-30 19:13       ` [PATCH 2/7] x86: introduce nr_irqs for 64bit v3 Yinghai Lu
2008-07-30 19:16       ` [PATCH 5/7] pci: make irq2_iommu to use dyn_array Yinghai Lu
2008-07-30 19:18       ` [PATCH 7/7] x86: make 64bit support dyn_array Yinghai Lu
2008-07-30 19:27       ` [PATCH 1/7] x86: 64bit support more than 256 irq v1 Yinghai Lu
2008-07-30 19:37       ` [PATCH 3/7] add dyn_array support Yinghai Lu
2008-07-30 19:40       ` [PATCH 6/7] irq: make irq_desc to use dyn_array Yinghai Lu
2008-07-30 19:40       ` [PATCH 4/7] random: make irq_timer_state " Yinghai Lu
2008-07-31  4:09       ` [PATCH 0/3] dyn_array support #2 Yinghai Lu
2008-07-31  4:10         ` [PATCH 1/3] serial: change irq_lists to use dyn_array Yinghai Lu
2008-07-31  5:58           ` Eric W. Biederman
2008-07-31  8:26           ` [PATCH] serial: change remove NR_IRQS in 8250.c Yinghai Lu
2008-07-31 11:50             ` Eric W. Biederman
2008-07-31 13:57               ` Alan Cox
2008-07-31 18:10                 ` Eric W. Biederman
2008-07-31 23:15                   ` Alan Cox
2008-08-01  3:20               ` Yinghai Lu
2008-07-31  4:11         ` [PATCH 2/3] add per_cpu_dyn_array support Yinghai Lu
2008-07-31  4:12         ` [PATCH 3/3] irq: make irqs in kernel stat use per_cpu_dyn_array Yinghai Lu
2008-07-31 10:14         ` [PATCH] x86 remove irq_vectors_limit.h Yinghai Lu
2008-07-31 16:32         ` [PATCH 0/3] dyn_array support #2 Mike Travis
2008-07-31 18:21           ` Yinghai Lu
2008-07-31 21:51         ` Peter Zijlstra
2008-07-31 22:07           ` Yinghai Lu
2008-07-31 22:25             ` Yinghai Lu
2008-08-01  3:52               ` Yinghai Lu
2008-07-31 22:14           ` Eric W. Biederman
2008-08-01 20:13       ` [PATCH 0/7] dyn_array support Eric W. Biederman

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=4890656D.4080906@sgi.com \
    --to=travis@sgi.com \
    --cc=akpm@linux-foundation.org \
    --cc=dhaval@linux.vnet.ibm.com \
    --cc=ebiederm@xmission.com \
    --cc=hpa@zytor.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=tglx@linutronix.de \
    --cc=yhlu.kernel@gmail.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.