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Regression: Bad page map in process xyz

DISCUSSION Jiri Slaby 6 participants 7 messages Feb 20, 2012 – Feb 27, 2012 Memory management

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Jiri Slaby

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#0 lore raw

Hi,

I'm getting a ton of

BUG: Bad page map in process zypper  pte:676b700029736c6f pmd:44967067

when trying to upgrade the system by:
zypper dup

I bisected that to:
commit afb1c03746aa940374b73a7d5750ee05a2376077

Author: Naoya Horiguchi <[email protected]>
Date:   Fri Feb 17 10:57:58 2012 +1100

thp: optimize away unnecessary page table locking

thanks,

Signature · 2 lines
js
suse labs
#1 lore raw
Quoted 7 lines · On poniedziałek, 20 lutego 2012 o 11:02:17 Jiri Slaby wrote:

Hi,

I'm getting a ton of

BUG: Bad page map in process zypper  pte:676b700029736c6f pmd:44967067

when trying to upgrade the system by:
zypper dup

Quoted 8 lines

I bisected that to:
commit afb1c03746aa940374b73a7d5750ee05a2376077

Author: Naoya Horiguchi <[email protected]>
Date:   Fri Feb 17 10:57:58 2012 +1100

thp: optimize away unnecessary page table locking

thanks,

I created a Bugzilla entry at
https://bugzilla.kernel.org/show_bug.cgi?id=42820
for your bug/regression report, please add your address to the CC list in there, thanks!

Signature · 9 lines
Maciej Rutecki
http://www.mrutecki.pl

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#2 lore raw
Quoted 13 lines · Maciej Rutecki
Quoted 12 lines · On poniedziałek, 20 lutego 2012 o 11:02:17 Jiri Slaby wrote:

Hi,

I'm getting a ton of

BUG: Bad page map in process zypper  pte:676b700029736c6f pmd:44967067

when trying to upgrade the system by:
zypper dup

I bisected that to:
commit afb1c03746aa940374b73a7d5750ee05a2376077

Author: Naoya Horiguchi <[email protected]>
Date:   Fri Feb 17 10:57:58 2012 +1100
Quoted 8 lines
Quoted 3 lines

thp: optimize away unnecessary page table locking

thanks,

I created a Bugzilla entry at
https://bugzilla.kernel.org/show_bug.cgi?id=42820
for your bug/regression report, please add your address to the CC list in there, thanks!

No, thanks for spotting it, but please remove from the regressions
report: it's not a regression in 3.3-rc but in linux-next - don't take my word for it, check the commit and you'll not find it in 3.3-rc.

We do still need to get the fix into linux-next: Horiguchi-san, has akpm put your fix in mm-commits yet? Please send it again if not.

Hugh

#3 lore raw
Quoted 23 lines · On niedziela, 26 lutego 2012 o 14:10:31 Hugh Dickins wrote:
Quoted 13 lines · Maciej Rutecki
Quoted 12 lines · On poniedziałek, 20 lutego 2012 o 11:02:17 Jiri Slaby wrote:

Hi,

I'm getting a ton of

BUG: Bad page map in process zypper  pte:676b700029736c6f pmd:44967067

when trying to upgrade the system by:
zypper dup

I bisected that to:
commit afb1c03746aa940374b73a7d5750ee05a2376077

Author: Naoya Horiguchi <[email protected]>
Date:   Fri Feb 17 10:57:58 2012 +1100
Quoted 8 lines
Quoted 3 lines

thp: optimize away unnecessary page table locking

thanks,

I created a Bugzilla entry at
https://bugzilla.kernel.org/show_bug.cgi?id=42820
for your bug/regression report, please add your address to the CC list in there, thanks!

Quoted 8 lines

No, thanks for spotting it, but please remove from the regressions
report: it's not a regression in 3.3-rc but in linux-next - don't take my word for it, check the commit and you'll not find it in 3.3-rc.

We do still need to get the fix into linux-next: Horiguchi-san, has akpm put your fix in mm-commits yet? Please send it again if not.

Hugh

Thanks for the information. I should check where is commit placed before.

Regards

Signature · 9 lines
Maciej Rutecki
http://www.mrutecki.pl

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#4 lore raw
In reply to Hugh Dickins
Quoted 23 lines · Hugh Dickins
Quoted 13 lines · Maciej Rutecki
Quoted 12 lines · On poniedziaA?ek, 20 lutego 2012 o 11:02:17 Jiri Slaby wrote:

Hi,

I'm getting a ton of

BUG: Bad page map in process zypper  pte:676b700029736c6f pmd:44967067

when trying to upgrade the system by:
zypper dup

I bisected that to:
commit afb1c03746aa940374b73a7d5750ee05a2376077

Author: Naoya Horiguchi <[email protected]>
Date:   Fri Feb 17 10:57:58 2012 +1100
Quoted 8 lines
Quoted 3 lines

thp: optimize away unnecessary page table locking

thanks,

I created a Bugzilla entry at
https://bugzilla.kernel.org/show_bug.cgi?id=42820
for your bug/regression report, please add your address to the CC list in there, thanks!

Quoted 6 lines

No, thanks for spotting it, but please remove from the regressions
report: it's not a regression in 3.3-rc but in linux-next - don't take my word for it, check the commit and you'll not find it in 3.3-rc.

We do still need to get the fix into linux-next: Horiguchi-san, has akpm put your fix in mm-commits yet? Please send it again if not.

FWIW, we've been getting a bunch of these since 3.0 in Fedora.
I've been trying to come up with some way of trying to reproduce them myself, without any luck. Some of our users seem to hit them surprisingly easily.

At first I started wondering if it was just bad hardware, but the frequency that we've been getting reports seems to suggest something more screwed up.

https://bugzilla.redhat.com/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=MODIFIED&bug_status=ON_DEV&bug_status=ON_QA&bug_status=VERIFIED&bug_status=RELEASE_PENDING&bug_status=POST&classification=Fedora&component=kernel&product=Fedora&query_format=advanced&short_desc=bug+page+map&short_desc_type=allwordssubstr&version=15&version=16&version=rawhide&order=bug_id&query_based_on=

Until last week, we only had reports up until 3.2, but now that the F17 alpha is getting tested, people are starting to hit it on 3.3rc too

I'll try a test build with that commit backed out for our users to try out next week.

Dave

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#5 lore raw
In reply to Hugh Dickins

Hi Hugh,

Quoted 23 lines · Hugh Dickins
Quoted 13 lines · Maciej Rutecki
Quoted 12 lines · On poniedziaa??i 1/4 |k, 20 lutego 2012 o 11:02:17 Jiri Slaby wrote:

Hi,

I'm getting a ton of

BUG: Bad page map in process zypper  pte:676b700029736c6f pmd:44967067

when trying to upgrade the system by:
zypper dup

I bisected that to:
commit afb1c03746aa940374b73a7d5750ee05a2376077

Author: Naoya Horiguchi <[email protected]>
Date:   Fri Feb 17 10:57:58 2012 +1100
Quoted 8 lines
Quoted 3 lines

thp: optimize away unnecessary page table locking

thanks,

I created a Bugzilla entry at
https://bugzilla.kernel.org/show_bug.cgi?id=42820
for your bug/regression report, please add your address to the CC list in there, thanks!

Quoted 6 lines

No, thanks for spotting it, but please remove from the regressions
report: it's not a regression in 3.3-rc but in linux-next - don't take my word for it, check the commit and you'll not find it in 3.3-rc.

We do still need to get the fix into linux-next: Horiguchi-san, has akpm put your fix in mm-commits yet? Please send it again if not.

Sorry for late reply.
And yes, this fix is in mm-commits now.

Thanks,
Naoya

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#6 lore raw
Quoted 5 lines · Naoya Horiguchi
Quoted 2 lines

We do still need to get the fix into linux-next: Horiguchi-san, has akpm put your fix in mm-commits yet? Please send it again if not.

Sorry for late reply.
And yes, this fix is in mm-commits now.

And in -next too as of today:
commit 57a2e0ac358d580399a63b54fe4275632bbf63f5

Author: Naoya Horiguchi <[email protected]>
Date:   Sat Feb 25 12:28:03 2012 +1100

fix mremap bug of failing to split thp

thanks,

Signature · 8 lines
js

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