2d223e0f89
- Use boot disks in OpenFirmware, fixing regression caused by 0001-ieee1275-implement-FCP-methods-for-WWPN-and-LUNs.patch, when the root LV is completely in the boot LUN (bsc#1197948) * 0001-ofdisk-improve-boot-time-by-lookup-boot-disk-first.patch - Fix error message in displaying help on bootable snapshot (bsc#1199609) OBS-URL: https://build.opensuse.org/request/show/980213 OBS-URL: https://build.opensuse.org/package/show/Base:System/grub2?expand=0&rev=415
64 lines
2.2 KiB
Diff
64 lines
2.2 KiB
Diff
From b0f9dcabe96e5689ecfba9b6abcd27e685eabd48 Mon Sep 17 00:00:00 2001
|
|
From: Michael Chang <mchang@suse.com>
|
|
Date: Wed, 11 May 2022 09:56:11 -0400
|
|
Subject: [PATCH] ofdisk: improve boot time by lookup boot disk first
|
|
|
|
While booting lvm, grub will try to build up logical volumes via hooks
|
|
to disk iteration where on-disk metadata can be read and parsed. However
|
|
the process can become very slow on multipath as reachable disks are
|
|
duplicated by multiple I/O paths and they all get inspected.
|
|
|
|
Fortunately grub allows lvm to be lazy binding and opportunistic that
|
|
root volume can be created when it's needed using a smaller set of
|
|
discovered disks. The disk iteration can also be controlled by pull
|
|
methods to only returning specified disks. That said we may be able to
|
|
take advantage of existing design to cause less overhead in lvm
|
|
construction.
|
|
|
|
This patch will return boot disks in OpenFirmware so they can be used
|
|
first. If lvm managed to create root volume out of those boot disks then
|
|
it is all very nice as they are readily available. Otherwise disk
|
|
scanning will be performed to present all discoverable disks to grub as
|
|
what it was done in the past. The result maybe again time consuming but
|
|
we have nothing to lose here.
|
|
|
|
Signed-off-by: Michael Chang <mchang@suse.com>
|
|
---
|
|
grub-core/disk/ieee1275/ofdisk.c | 11 +++++++++--
|
|
1 file changed, 9 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/grub-core/disk/ieee1275/ofdisk.c b/grub-core/disk/ieee1275/ofdisk.c
|
|
index 258a6e3891..410f4b849f 100644
|
|
--- a/grub-core/disk/ieee1275/ofdisk.c
|
|
+++ b/grub-core/disk/ieee1275/ofdisk.c
|
|
@@ -491,10 +491,11 @@ grub_ofdisk_iterate (grub_disk_dev_iterate_hook_t hook, void *hook_data,
|
|
{
|
|
unsigned i;
|
|
|
|
- if (pull != GRUB_DISK_PULL_NONE)
|
|
+ if (pull > GRUB_DISK_PULL_REMOVABLE)
|
|
return 0;
|
|
|
|
- scan ();
|
|
+ if (pull == GRUB_DISK_PULL_REMOVABLE)
|
|
+ scan ();
|
|
|
|
for (i = 0; i < ARRAY_SIZE (ofdisk_hash); i++)
|
|
{
|
|
@@ -532,6 +533,12 @@ grub_ofdisk_iterate (grub_disk_dev_iterate_hook_t hook, void *hook_data,
|
|
if (!ent->is_boot && ent->is_removable)
|
|
continue;
|
|
|
|
+ if (pull == GRUB_DISK_PULL_NONE && !ent->is_boot)
|
|
+ continue;
|
|
+
|
|
+ if (pull == GRUB_DISK_PULL_REMOVABLE && ent->is_boot)
|
|
+ continue;
|
|
+
|
|
if (hook (ent->grub_shortest, hook_data))
|
|
return 1;
|
|
}
|
|
--
|
|
2.34.1
|
|
|