linux-kernel - Re: [PATCH v2 12/26] x86, irq: Add realloc_irq_and_cfg

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAE9FiQUWxiLtw4xpe-Xt9peCpUMn-vsTHh4hDf=m5xs3pAf7nA@mail.gmail.com>
Date:	Fri, 8 Mar 2013 23:22:43 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, Joerg Roedel <joro@...tes.org>,
	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
Subject: Re: [PATCH v2 12/26] x86, irq: Add realloc_irq_and_cfg_at()

On Fri, Mar 8, 2013 at 11:53 AM, Konrad Rzeszutek Wilk
<konrad.wilk@...cle.com> wrote:
>> + * irq_realloc_desc - allocate irq descriptor for irq that is already reserved
>
> Which begs the question - why was it not allocated when it was reserved?

The reasons for not allocating them during reserving:
1. only several pins in ioapic are used, allocate for them pin, will
   waste memory for not used one.
2. relocate later could make sure irq_desc is allocated on local node ram.

Thanks

Yinghai
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/