At this time, the bug is still persistent in Gutsy. Difference at my
setup: 70 mb/s vs 250 mb/s. Is it possible to give an update of the
expected solution date?
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insane default readahead settings on device and unused readahead setting in LVM
https://bugs.launchpad.net/bugs/129488
You received
On Tue, Jul 31, 2007 at 09:06:14PM -, James Troup wrote:
This is apparently a known issue upstream, but not considered a
priority:
Actually patches for better readahead support are being worked on
by Zdenek Kabelac and are nearly ready.
Alasdair
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[EMAIL PROTECTED]
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insane
From irc, work-around after boot is:
blockdev --setra 8192 /dev/vg/lv
We need to find the right place to fix this by default. Kernel patch
needed?
** Changed in: lvm2 (Ubuntu)
Importance: Undecided = Medium
Status: New = Confirmed
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insane default readahead settings on device
And here's a udev hack...
** Attachment added: gross hack to make --setra stick
http://launchpadlibrarian.net/8642472/udev-hack.diff
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insane default readahead settings on device and unused readahead setting in LVM
https://bugs.launchpad.net/bugs/129488
You received this bug notification
** Description changed:
Binary package hint: lvm2
- When you create an LV, the device ends up with a readahead of 256 bytes.
- A normal (non-LVM) device's readahead appears to default to 8192 bytes.
- This makes LVM FSs benchmark (and perform) very badly (our read rate
- dropped from 320M/s
