Messages in this thread | | | Date | Wed, 14 Feb 2024 16:10:33 +0100 | From | Paul Menzel <> | Subject | init tis() takes 50 ms on Dell XPS 13 9360 – almost 10 % of whole time until initrd |
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Dear Linux folks,
Trying to optimize the boot time of Linux on the Dell XPS 13 9360, probing of MSFT0101:00 takes 52 ms, making `init_tis()` taking almost 10 % alone until starting the initrd:
[ 0.000000] Linux version 6.8.0-rc4 (build@bohemianrhapsody.molgen.mpg.de) (gcc (Debian 13.2.0-13) 13.2.0, GNU ld (GNU Binutils for Debian) 2.42) #20 SMP PREEMPT_DYNAMIC Mon Feb 12 09:40:49 CET 2024 […] [ 0.000000] DMI: Dell Inc. XPS 13 9360/0596KF, BIOS 2.21.0 06/02/2022 […] [ 0.320057] calling init_tis+0x0/0x100 @ 1 [ 0.332190] tpm_tis MSFT0101:00: 2.0 TPM (device-id 0xFE, rev-id 4) [ 0.372164] probe of MSFT0101:00 returned 0 after 52101 usecs [ 0.372186] initcall init_tis+0x0/0x100 returned 0 after 52127 usecs […] [ 0.588643] Freeing unused decrypted memory: 2036K [ 0.589068] Freeing unused kernel image (initmem) memory: 3976K [ 0.606115] Write protecting the kernel read-only data: 22528k [ 0.606527] Freeing unused kernel image (rodata/data gap) memory: 276K [ 0.652327] x86/mm: Checked W+X mappings: passed, no W+X pages found. [ 0.652329] x86/mm: Checking user space page tables [ 0.695968] x86/mm: Checked W+X mappings: passed, no W+X pages found. [ 0.696104] Run /init as init process […]
For users, where boot time is most important, can this be moved out of the hot path somehow?
Kind regards,
Paul
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