From: Gerd Hoffmann <kraxel@redhat.com>
To: Chao Peng <chao.p.peng@linux.intel.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Haozhong Zhang <haozhong.zhang@intel.com>,
Xiao Guangrong <guangrong.xiao@linux.intel.com>,
Eduardo Habkost <ehabkost@redhat.com>,
qemu-devel@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>,
gor Mammedov <imammedo@redhat.com>, Amnon Ilan <ailan@redhat.com>,
Richard Henderson <rth@twiddle.net>,
seabios <seabios@seabios.org>
Subject: Re: [Qemu-devel] [RFC PATCH v2 00/12] Guest startup time optimization
Date: Mon, 12 Sep 2016 17:15:17 +0200 [thread overview]
Message-ID: <1473693317.26901.64.camel@redhat.com> (raw)
In-Reply-To: <1473172081.4674.23.camel@linux.intel.com>
Hi,
> > AFAIK latest seabios already supports DMA.
> > It's easy to add more config options for seabios
> > if you are so inclined.
>
> Yes, I tried that, the fw_cfg overhead in SeaBios/linuxboot optrom is
> already not a big issue for us. However, there are still some other
> code in SeaBIOS needs to be investigated.
What exactly?
Also a few suggestions:
* Try the seabios master branch. There have been some improvements
recently which are not in the 1.9 release.
* Use a stripped down config. When booting a kernel directly you
don't need storage and usb drivers, also no keyboard. That all
reduces init time.
* Initializing all pci devices (placing bars in address space and
programming them) can probably be skipped and left to the linux
kernel to handle. But when trying take care that the effect might
be that we shift just startup time from seabios to linux kernel,
the placement needs to happen somewhere after all.
* When discussing these things add the seabios list
(seabios@seabios.org) to cc: Added the list now.
cheers,
Gerd
next prev parent reply other threads:[~2016-09-12 15:15 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-25 10:14 [Qemu-devel] [RFC PATCH v2 00/12] Guest startup time optimization Chao Peng
2016-08-25 10:14 ` [Qemu-devel] [RFC PATCH v2 01/12] pc: make smbus configurable Chao Peng
2016-09-06 20:18 ` Eduardo Habkost
2016-08-25 10:14 ` [Qemu-devel] [RFC PATCH v2 02/12] pc: make sata configurable Chao Peng
2016-08-25 10:14 ` [Qemu-devel] [RFC PATCH v2 03/12] pc: make pic configurable Chao Peng
2016-08-25 10:14 ` [Qemu-devel] [RFC PATCH v2 04/12] pc: make pit configurable Chao Peng
2016-08-25 10:14 ` [Qemu-devel] [RFC PATCH v2 05/12] acpi: build static _PRT Chao Peng
2016-08-29 17:06 ` Paolo Bonzini
2016-08-25 10:14 ` [Qemu-devel] [RFC PATCH v2 06/12] acpi: expose data structurs and functions of BIOS linker loader Chao Peng
2016-08-25 10:15 ` [Qemu-devel] [RFC PATCH v2 07/12] acpi: expose acpi_checksum() Chao Peng
2016-08-25 10:15 ` [Qemu-devel] [RFC PATCH v2 08/12] acpi: patch guest ACPI when there is no firmware Chao Peng
2016-08-25 10:15 ` [Qemu-devel] [RFC PATCH v2 09/12] ich9: enable pm registers " Chao Peng
2016-08-25 10:15 ` [Qemu-devel] [RFC PATCH v2 10/12] q35: initialize MMCFG base " Chao Peng
2016-08-25 10:15 ` [Qemu-devel] [RFC PATCH v2 11/12] pc: support direct loading protected/long mode kernel Chao Peng
2016-08-25 10:15 ` [Qemu-devel] [RFC PATCH v2 12/12] pc: skip firmware Chao Peng
2016-08-29 17:08 ` Paolo Bonzini
2016-09-02 11:08 ` [Qemu-devel] [RFC PATCH v2 00/12] Guest startup time optimization Paolo Bonzini
2016-09-05 2:37 ` Michael S. Tsirkin
2016-09-06 10:48 ` Chao Peng
2016-09-06 11:53 ` Michael S. Tsirkin
2016-09-06 14:28 ` Chao Peng
2016-09-12 15:15 ` Gerd Hoffmann [this message]
2016-09-12 17:57 ` [Qemu-devel] [SeaBIOS] " Peter Stuge
2016-09-06 14:21 ` [Qemu-devel] " Paolo Bonzini
2016-09-06 14:31 ` Chao Peng
2016-09-06 14:45 ` Michael S. Tsirkin
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