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mikegpitt
Advocate
Joined: 22 May 2004
Posts: 3224
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 Posted: Sat Feb 28, 2009 7:52 pm Post subject: |
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| TrentonAdams wrote: | | Perhaps it would be worthwhile for the Gentoo folks to add 2.6.17 back into the portage? I noticed there is a 2.6.16 in there though. |
It isn't advisable to run anything prior to 2.6.19 due to the security issue discovered that hit all kernels before then. |
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TrentonAdams
n00b
Joined: 16 Aug 2008
Posts: 64
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| Posted: Sat Feb 28, 2009 9:53 pm Post subject: |
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I am running a workstation, not a server. Running anything later than 2.6.17 is not an option for me, given that I get a whopping 3M/sec disk performance on ALL newer kernels. The only other option is to NOT RUN LINUX, which I am not willing to entertain  |
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pappy_mcfae
Watchman
Joined: 27 Dec 2007
Posts: 5999
Location: Pomona, California.
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| Posted: Sat Feb 28, 2009 10:04 pm Post subject: |
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| TrentonAdams wrote: | | Perhaps it would be worthwhile for the Gentoo folks to add 2.6.17 back into the portage? I noticed there is a 2.6.16 in there though. |
If you want to grab an old ebuild, this is the place to do so. Go down to sys/kernel, then click vanilla-sources, and voila! You have every vanilla-source kernel ebuild to ever appear in the portage tree. That's how I got all my ebuilds for all the kernel versions I support.
Blessed be!
Pappy
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general
Tux's lil' helper
Joined: 15 Jul 2007
Posts: 90
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| Posted: Sun Mar 01, 2009 6:50 am Post subject: |
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| mikegpitt wrote: | | Is that the kernel bug that was recently solved? I heard about some bug that impacted performance, and the issue was that there was never a reproducible test case, until about a month ago. |
according to them the problem exist in the I/O scheduler ( the CFQ scheduler)
| Quote: | To use the AS scheduler and test for yourself, just specify "elevator=as" as a
boot option.
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Oh and hey look what you got set in the config for your new kernel
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#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
CONFIG_CLASSIC_RCU=y
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TrentonAdams
n00b
Joined: 16 Aug 2008
Posts: 64
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| Posted: Sun Mar 01, 2009 7:17 am Post subject: |
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| Disabling the CFQ does nothing, as is the case with most people who tried it. I disabled CFQ to no avail, it had ZERO effect on my system performance. I tried this both on SUSE, and Gentoo. SUSE has a configuration option for it. |
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TrentonAdams
n00b
Joined: 16 Aug 2008
Posts: 64
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| Posted: Sun Mar 01, 2009 10:23 pm Post subject: |
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| By the way, I unmasked the gentoo-sources kernel, and it appears to be gone with 2.6.28. |
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Kernel & Hardware
