Avi Kivity wrote:
On 10/30/2009 08:07 PM, Andrew Theurer wrote:
I have finally bisected and isolated this to the following commit:
ada3fa15057205b7d3f727bba5cd26b5912e350f
http://git.kernel.org/?p=virt/kvm/kvm.git;a=commit;h=ada3fa15057205b7d3f727bba5cd26b5912e350f
Merge branch 'for-linus' of git://git./linux/kernel/git/tj/percpu
* 'for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (46 commits)
powerpc64: convert to dynamic percpu allocator
sparc64: use embedding percpu first chunk allocator
percpu: kill lpage first chunk allocator
x86,percpu: use embedding for 64bit NUMA and page for 32bit NUMA
percpu: update embedding first chunk allocator to handle sparse units
percpu: use group information to allocate vmap areas sparsely
vmalloc: implement pcpu_get_vm_areas()
vmalloc: separate out insert_vmalloc_vm()
percpu: add chunk->base_addr
percpu: add pcpu_unit_offsets[]
percpu: introduce pcpu_alloc_info and pcpu_group_info
percpu: move pcpu_lpage_build_unit_map() and
pcpul_lpage_dump_cfg() upward
percpu: add @align to pcpu_fc_alloc_fn_t
percpu: make @dyn_size mandatory for pcpu_setup_first_chunk()
percpu: drop @static_size from first chunk allocators
percpu: generalize first chunk allocator selection
percpu: build first chunk allocators selectively
percpu: rename 4k first chunk allocator to page
percpu: improve boot messages
percpu: fix pcpu_reclaim() locking
The previous commit (5579fd7e6aed8860ea0c8e3f11897493153b10ad) does not
this problem. FYI, this problem only occurs when oprofile is active.
Any idea what in this commit might be the issue?
5579 is not the preceding commit, it is the merged branch:
commit ada3fa15057205b7d3f727bba5cd26b5912e350f
Merge: 2f82af0 5579fd7
Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date: Tue Sep 15 09:39:44 2009 -0700
Merge branch 'for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
What happens with 2f82af0?
2f82af0 is:
Nicolas Pitre has a new email address
Due to problems at cam.org, my nico@xxxxxxx email address is no longer
valid. FRom now on, nico@xxxxxxxxxxx should be used instead.
I have not tested that, but it doesn't seem likely that it would have
anything to do with the problem. Or maybe I am misunderstanding the
impact of this commit?
FWIW, here is the bisect log:
git bisect start
# good: [227423904c709a8e60245c97081bbeb4fb500655] Merge branch
'x86-pat-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
git bisect good 227423904c709a8e60245c97081bbeb4fb500655
# bad: [0f29f5871c165e346409f62d903f97cfad3894c5] Staging: rtl8192su:
remove RTL8192SU ifdefs
git bisect bad 0f29f5871c165e346409f62d903f97cfad3894c5
# bad: [ada3fa15057205b7d3f727bba5cd26b5912e350f] Merge branch
'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
git bisect bad ada3fa15057205b7d3f727bba5cd26b5912e350f
# bad: [ada3fa15057205b7d3f727bba5cd26b5912e350f] Merge branch
'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
git bisect bad ada3fa15057205b7d3f727bba5cd26b5912e350f
# good: [decee2e8a9538ae5476e6cb3f4b7714c92a04a2b] V4L/DVB (12485):
zl10353: correct implementation of FE_READ_UNCORRECTED_BLOCKS
git bisect good decee2e8a9538ae5476e6cb3f4b7714c92a04a2b
# good: [0ee7e4d6d4f58c3b2d9f0ca8ad8f63abda8694b1] V4L/DVB (12694):
gspca - vc032x: Change the start exchanges of the sensor hv7131r.
git bisect good 0ee7e4d6d4f58c3b2d9f0ca8ad8f63abda8694b1
# good: [f58dc01ba2ca9fe3ab2ba4ca43d9c8a735cf62d8] percpu: generalize
first chunk allocator selection
git bisect good f58dc01ba2ca9fe3ab2ba4ca43d9c8a735cf62d8
# good: [2f82af08fcc7dc01a7e98a49a5995a77e32a2925] Nicolas Pitre has a
new email address
git bisect good 2f82af08fcc7dc01a7e98a49a5995a77e32a2925
# good: [cf88c79006bd6a09ad725ba0b34c0e23db20b19e] vmalloc: separate out
insert_vmalloc_vm()
git bisect good cf88c79006bd6a09ad725ba0b34c0e23db20b19e
# good: [4518e6a0c038b98be4c480e6f4481e8676bd15dd] x86,percpu: use
embedding for 64bit NUMA and page for 32bit NUMA
git bisect good 4518e6a0c038b98be4c480e6f4481e8676bd15dd
# good: [bcb2107fdbecef3de55d597d23453747af81ba88] sparc64: use
embedding percpu first chunk allocator
git bisect good bcb2107fdbecef3de55d597d23453747af81ba88
# good: [5579fd7e6aed8860ea0c8e3f11897493153b10ad] Merge branch
'for-next' into for-linus
git bisect good 5579fd7e6aed8860ea0c8e3f11897493153b10ad
Oh, wait, that commit was tested, in the middle of the log above.
-Andrew
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