Public bug reported:
Hello,
I think the default "readahead" configuration hurts the system performance.
Just an example:
---
m...@m-desktop:~$ grep modules /etc/readahead/boot | head -5
/lib/linux-restricted-modules/2.6.24-16-generic/ath_hal/ah_os.o
/lib/linux-restricted-modules/2.6.24-16-generic/ath_hal/ath_hal.mod.o
/lib/linux-restricted-modules/2.6.24-16-generic/ath_hal/i386-elf.hal.o
/lib/linux-restricted-modules/2.6.24-16-generic/fcdsl/dbgif.o
/lib/linux-restricted-modules/2.6.24-16-generic/fcdsl/driver.o
m...@m-desktop:~$ grep -v "^#" /boot/grub/menu.lst |grep -i "^kernel"
kernel /vmlinuz-2.6.24-23-generic
root=UUID=b3ea2423-5081-46dc-a6e3-e46987f99f3e ro quiet splash
kernel /vmlinuz-2.6.24-23-generic
root=UUID=b3ea2423-5081-46dc-a6e3-e46987f99f3e ro single
kernel /vmlinuz-2.6.24-22-generic
root=UUID=b3ea2423-5081-46dc-a6e3-e46987f99f3e ro quiet splash
kernel /vmlinuz-2.6.24-22-generic
root=UUID=b3ea2423-5081-46dc-a6e3-e46987f99f3e ro single
kernel /vmlinuz-2.6.24-19-generic
root=UUID=b3ea2423-5081-46dc-a6e3-e46987f99f3e ro quiet splash
kernel /vmlinuz-2.6.24-19-generic
root=UUID=b3ea2423-5081-46dc-a6e3-e46987f99f3e ro single
kernel /memtest86+.bin
m...@m-desktop:~$
---
I think:
- either "readahead" should avoid caching the version dependent files (like
"2.6.24-16" kernel modules)
- or you should remove "readahead" from "ubuntu-desktop" package dependencies
(and possibly replace it with "preload")
Regards.
** Affects: ubuntu
Importance: Undecided
Status: New
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readahead default configuration hurts the system performance
https://bugs.launchpad.net/bugs/318505
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