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* Mon Jul 25 2022 Miroslav Rezanina <mrezanin@redhat.com> - 1.16.0-4

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- seabios-virtio-blk-use-larger-default-request-size.patch [bz#2108555]
- Resolves: bz#2108555
  ([rhel.9.1] Loading a kernel/initrd is sometimes very slow)
This commit is contained in:
Miroslav Rezanina 2022-07-25 03:14:57 -04:00
parent 47d3ebb03b
commit d7bb63ba8e
2 changed files with 50 additions and 1 deletions
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42
seabios-virtio-blk-use-larger-default-request-size.patch Normal file
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@ -0,0 +1,42 @@
From 7ef00c50cafaf356b9aef5f7c7865b405de6b2f5 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 30 Jun 2022 17:28:40 +0200
Subject: [PATCH] virtio-blk: use larger default request size
RH-Author: Gerd Hoffmann <kraxel@redhat.com>
RH-MergeRequest: 5: virtio-blk: use larger default request size
RH-Commit: [1/1] 5b2833de23fdab9fc3c170e448e9ed07d9fb82dd (kraxel/centos-seabios)
RH-Bugzilla: 2108555
RH-Acked-by: Oliver Steffen <osteffen@redhat.com>
RH-Acked-by: Pawel Polawski <ppolawsk@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
Bump default from 8 to 64 blocks. Using 8 by default leads
to requests being splitted on qemu, which slows down boot.
Some (temporary) debug logging added showed that almost all
requests on a standard fedora install are less than 64 blocks,
so that should bring us back to 1.15 performance levels.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 46de2eec93bffa0706e6229c0da2919763c8eb04)
---
src/hw/virtio-blk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/hw/virtio-blk.c b/src/hw/virtio-blk.c
index 929ba887..9b4a05a4 100644
--- a/src/hw/virtio-blk.c
+++ b/src/hw/virtio-blk.c
@@ -95,7 +95,7 @@ virtio_blk_op(struct disk_op_s *op, int write)
blk_num_max = (u16)max_io_size / vdrive->drive.blksize;
else
/* default blk_num_max if hardware doesnot advise a proper value */
- blk_num_max = 8;
+ blk_num_max = 64;
if (op->count <= blk_num_max) {
virtio_blk_op_one_segment(vdrive, write, sg);
--
2.31.1

9
seabios.spec
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@ -1,6 +1,6 @@
Name: seabios
Version: 1.16.0
Release: 3%{?dist}
Release: 4%{?dist}
Summary: Open-source legacy BIOS implementation
License: LGPLv3
@ -25,6 +25,8 @@ Patch4: seabios-malloc-use-large-ZoneHigh-when-there-is-enough-memor.patch
Patch5: seabios-pci-refactor-the-pci_config_-functions.patch
# For bz#2086407 - qemu reboot problem with seabios 1.16.0
Patch6: seabios-reset-force-standard-PCI-configuration-access.patch
# For bz#2108555 - [rhel.9.1] Loading a kernel/initrd is sometimes very slow
Patch7: seabios-virtio-blk-use-larger-default-request-size.patch
# Source-git patches
@ -143,6 +145,11 @@ install -m 0644 binaries/vgabios*.bin $RPM_BUILD_ROOT%{_datadir}/seavgabios
%{_datadir}/seavgabios/vgabios*.bin
%changelog
* Mon Jul 25 2022 Miroslav Rezanina <mrezanin@redhat.com> - 1.16.0-4
- seabios-virtio-blk-use-larger-default-request-size.patch [bz#2108555]
- Resolves: bz#2108555
([rhel.9.1] Loading a kernel/initrd is sometimes very slow)
* Thu May 26 2022 Miroslav Rezanina <mrezanin@redhat.com> - 1.16.0-3
- seabios-pci-refactor-the-pci_config_-functions.patch [bz#2086407]
- seabios-reset-force-standard-PCI-configuration-access.patch [bz#2086407]