From: Laszlo Ersek <lersek@redhat.com>
To: edk2-devel-01 <edk2-devel@lists.01.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>,
Xiang Zheng <xiang.zheng@linaro.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: Re: [PATCH 0/6] OvmfPkg, ArmVirtQemu: leaner platform BDS policy for connecting devices
Date: Wed, 14 Mar 2018 11:30:13 +0100 [thread overview]
Message-ID: <3aa98cee-4836-4843-5c72-2608df307293@redhat.com> (raw)
In-Reply-To: <20180313212233.19215-1-lersek@redhat.com>
On 03/13/18 22:22, Laszlo Ersek wrote:
> Repo: https://github.com/lersek/edk2.git
> Branch: qemu_bootorder_connect
>
> Adding tens or hundreds of bootable devices to a QEMU VM config slows
> the OVMF and ArmVirtQemu boots to a crawl, several people have reported
> in the past.
>
> There are at least two reasons for this (high pflash traffic due to
> heavy nvvar massaging per device, and PCI config space access slowing
> down on QEMU as the number of regions increases). However, part of the
> pain is self-inflicted in our PlatformBootManagerLib instances: we
> connect all bootable devices (for maximum compatibility with the user's
> VM config) even if the user doesn't intend to boot off most of them.
>
> It's oft repeated that the set of devices connected during boot is
> platform policy, so this series replaces the culprit
> EfiBootManagerConnectAll() calls with a bit smarter algorithm.
Thanks everyone for the super quick feedback!
Commit range 12957e56d26d..ff1d0fbfbaec.
Cheers,
Laszlo
prev parent reply other threads:[~2018-03-14 10:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-13 21:22 [PATCH 0/6] OvmfPkg, ArmVirtQemu: leaner platform BDS policy for connecting devices Laszlo Ersek
2018-03-13 21:22 ` [PATCH 1/6] OvmfPkg/QemuBootOrderLib: wrap overlong line Laszlo Ersek
2018-03-13 21:22 ` [PATCH 2/6] OvmfPkg/QemuBootOrderLib: add missing EFIAPI specifiers Laszlo Ersek
2018-03-13 21:22 ` [PATCH 3/6] OvmfPkg/QemuBootOrderLib: clean up translation of virtio-net over MMIO Laszlo Ersek
2018-03-13 21:22 ` [PATCH 4/6] OvmfPkg/QemuBootOrderLib: add ConnectDevicesFromQemu() Laszlo Ersek
2018-03-13 21:22 ` [PATCH 5/6] OvmfPkg/PlatformBootManagerLib: minimize the set of connected devices Laszlo Ersek
2018-03-13 21:22 ` [PATCH 6/6] ArmVirtPkg/PlatformBootManagerLib: " Laszlo Ersek
2018-03-14 9:01 ` [PATCH 0/6] OvmfPkg, ArmVirtQemu: leaner platform BDS policy for connecting devices Ard Biesheuvel
2018-03-14 9:16 ` zhengxiang (A)
2018-03-14 10:30 ` Laszlo Ersek [this message]
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