*** This bug is a duplicate of bug 793702 ***
https://bugs.launchpad.net/bugs/793702
** This bug has been marked a duplicate of bug 793702
Natty update to 2.6.38.8 stable release
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This bug was fixed in the package linux - 2.6.38-11.48
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linux (2.6.38-11.48) natty-proposed; urgency=low
[Herton R. Krzesinski]
* Release Tracking Bug
- LP: #818175
[ Upstream Kernel Changes ]
* Revert HID: magicmouse: ignore 'ivalid report id' while switching
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
natty' to 'verification-done-natty'.
If verification is not done by one week from today,
I've repeated the test scenario as described in comment #7 with 500 copy
operations using the script (see comment #7 too) to give it nearly 4
hours of intensive file copying soak testing. Works fine, no lock-
ups/hangs.
Marking it as verified.
** Tags added: natty-verification-done
** Tags
** Tags added: verification-done-natty
** Tags removed: natty-verification-done
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https://bugs.launchpad.net/bugs/808509
Title:
SRU: Stop kswapd consuming 100% CPU when highest zone is
SRU Justification
Impact: Sandy Bridge platforms with a small normal zone can apparently
lockup when copying from a fast I/O source to a slower I/O destination,
e.g., disk to USB stick.
Patch Description: A number of upstream changes have made accommodation
for how pages are allocated when the
@Tim, managed to get some overnight testing on this kernel, results are
very good:
Did 1000 x test cycles, each copying ~795MB of data (~7 hours of soak
testing), no lock-ups on a SNB laptop with 4GB memory. Also re-ran with
500 x test cycles with 2GB memory (as this *really* exercises the bug).
** Changed in: linux (Ubuntu Natty)
Status: In Progress = Fix Committed
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https://bugs.launchpad.net/bugs/808509
Title:
SRU: Stop kswapd consuming 100% CPU when highest zone is
@Tim, Will do, however I will probably get around to this on Thursday
as I'm off on sick leave until then. I have a good set of reproducer
scripts + H/W that can faithfully trigger the bug.
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gregkh has declined Mel's patchset for 2.6.38.y as it is no longer
supported as a stable release.
** Package changed: linux-meta (Ubuntu) = linux (Ubuntu)
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@Tim, does this invalid these patches for a SRU then? Or can we still
run with them?
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https://bugs.launchpad.net/bugs/808509
Title:
SRU: Stop kswapd consuming 100% CPU when highest
Colin - We could still SRU theses for Natty, but I'd definitely need a
reproducer. I assume you have a reliable method for demonstrating the
problem?
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From the posting: The reproduction case is almost always during
copying large files that kswapd pegs at 100% CPU until the file is
deleted or cache is dropped.
I believe I've seen this behaviour on earlier hardware than sandybridge,
I can trigger it with good reliability using abocks
Colin - In your copious spare time perhaps you could try building this
Natty master-next kernel and testing it on an SB:
The following changes since commit 006d932cf137dfcc156647dc08a0dda6e3e0f890:
Tao Ma (1):
ext4: init timer earlier to avoid a kernel panic in __save_error_info,
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