Gentoo Archives: gentoo-user

From: Jacques Montier <jmontier@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Long boot time after kernel update
Date: Mon, 27 Dec 2021 11:07:27
Message-Id: CAHVEG0DeoMNNmeUWcrJubKvBV2VTNhJebgaQAYBDxE7okx4YbQ@mail.gmail.com
In Reply to: Re: [gentoo-user] Long boot time after kernel update by Wols Lists
1 Le lun. 27 déc. 2021 à 01:44, Wols Lists <antlists@××××××××××××.uk> a
2 écrit :
3
4 > On 26/12/2021 18:50, Jacques Montier wrote:
5 > > Hello all,
6 > >
7 > > I update to the last stable kernel 5.15.11-gentoo with the same
8 > > configuration as the old kernel and now, the boot time is quite long.
9 > >
10 > > Test :
11 > > 5.10.76-gentoo-r1 kernel : boot time 30s
12 > > 5.15.11-gentoo kernel : boot time 70s
13 > >
14 > > My setup (non EFI) :
15 > > - SSD 250 Go : /dev/sdd1 ext2 for boot and /dev/sdd2 ext4 for /
16 > > - SSD 250 Go /dev/sdc1 ext4 for home
17 > > - Two 2T sata disks Seagate BarraCuda 3.5 /dev/sda1 ext4 for data and
18 > > /dev/sdb1 ext4 for data backup (Not Raid)
19 > >
20 > > With the new kernel, the two Seagate disks seem to make the boot time
21 > > quite longer.
22 > >
23 > > Test :
24 > > booting without mounting the disks : 20s
25 > > booting with mounting only one disk : 25s
26 > > booting with both disks : more than 60s
27 > >
28 > > Testing the disks :
29 > > - smartctl -s on -a /dev/sda and smartctl -s on -a /dev/sdb : No error
30 > > reported.
31 > > - fsck -a /dev/sda1 and fsck -a /dev/sdb1 : clean
32 > > - e2fsck -cfpv /dev/sda1 : clean
33 > >
34 > > Nevertheless, dmesg shows a lot of errors (attached image) with the new
35 > > kernel.
36 > > Those errors do not appear with 5.10.76-gentoo-r1 kernel.
37 > >
38 > > I'm rather confused...
39 > > Have you any idea ?
40 > >
41 > What does fdisk print say? Are your partitions mis-aligned?
42 >
43 > Unlikely, but it depends how long ago they were partitioned. There's all
44 > this stuff about switching from 512B to 4K sectors and that *could* be
45 > the problem.
46 >
47 > Cheers,
48 > Wol
49 >
50 >
51 Thanks Wol,
52
53 The output of fdisk for my two 2T disks :
54
55 ...........................
56 Disque /dev/sda : 1,82 TiB, 2000398934016 octets, 3907029168 secteurs
57 Modèle de disque : ST2000DM008-2FR1
58 Unités : secteur de 1 × 512 = 512 octets
59 Taille de secteur (logique / physique) : 512 octets / 4096 octets
60 taille d'E/S (minimale / optimale) : 4096 octets / 4096 octets
61 Type d'étiquette de disque : dos
62 Identifiant de disque : 0xe0e26837
63
64 Périphérique Amorçage Début Fin Secteurs Taille Id Type
65 /dev/sda1 2048 3907028991 3907026944 1,8T 83 Linux
66
67 Disque /dev/sdb : 1,82 TiB, 2000398934016 octets, 3907029168 secteurs
68 Modèle de disque : ST2000DM008-2FR1
69 Unités : secteur de 1 × 512 = 512 octets
70 Taille de secteur (logique / physique) : 512 octets / 4096 octets
71 taille d'E/S (minimale / optimale) : 4096 octets / 4096 octets
72 Type d'étiquette de disque : dos
73 Identifiant de disque : 0x7c91a79a
74
75 Périphérique Amorçage Début Fin Secteurs Taille Id Type
76 /dev/sdb1 2048 3907028991 3907026944 1,8T 83 Linux
77
78 ...............................
79
80 Well, i don't know if my partitions are aligned or mis-aligned... How could
81 i get it ?
82
83 Cheers,
84
85 --
86 Jacques

Replies

Subject Author
Re: [gentoo-user] Long boot time after kernel update Wols Lists <antlists@××××××××××××.uk>