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[BUG] Lockless patches cause hardlock under heavy IO

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From: Ryan Hope <rmh3093@...>
To: <linux-mm@...>, LKML <linux-kernel@...>
Subject: [BUG] Lockless patches cause hardlock under heavy IO
Date: Wednesday, June 18, 2008 - 5:15 pm

I applied the following patches from 2.6-26-rc5-mm3 to 2.6.26-rc6 and
they caused a hardlock under heavy IO:

x86-implement-pte_special.patch
mm-introduce-get_user_pages_fast.patch
mm-introduce-get_user_pages_fast-fix.patch
mm-introduce-get_user_pages_fast-checkpatch-fixes.patch
x86-lockless-get_user_pages_fast.patch
x86-lockless-get_user_pages_fast-checkpatch-fixes.patch
x86-lockless-get_user_pages_fast-fix.patch
x86-lockless-get_user_pages_fast-fix-2.patch
x86-lockless-get_user_pages_fast-fix-2-fix-fix.patch
x86-lockless-get_user_pages_fast-fix-warning.patch
dio-use-get_user_pages_fast.patch
splice-use-get_user_pages_fast.patch
x86-support-1gb-hugepages-with-get_user_pages_lockless.patch
#
mm-readahead-scan-lockless.patch
radix-tree-add-gang_lookup_slot-gang_lookup_slot_tag.patch
#mm-speculative-page-references.patch: clameter saw bustage
mm-speculative-page-references.patch
mm-speculative-page-references-fix.patch
mm-speculative-page-references-fix-fix.patch
mm-speculative-page-references-hugh-fix3.patch
mm-lockless-pagecache.patch
mm-spinlock-tree_lock.patch
powerpc-implement-pte_special.patch

I am on an x86_64. I dont know what other info you need...

-Ryan
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Messages in current thread:
[BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Wed Jun 18, 5:15 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Peter Zijlstra, (Thu Jun 19, 4:12 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Nick Piggin, (Thu Jun 19, 4:19 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Sun Jun 22, 10:37 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Peter Zijlstra, (Sun Jun 22, 11:07 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Sun Jun 22, 11:18 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Nick Piggin, (Sun Jun 22, 10:29 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Zan Lynx, (Mon Jun 23, 7:48 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Sun Jun 22, 11:51 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Nick Piggin, (Mon Jun 23, 7:54 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Paul E. McKenney, (Mon Jun 23, 9:05 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Nick Piggin, (Mon Jun 23, 8:13 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Tue Jun 24, 11:12 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Paul E. McKenney, (Tue Jun 24, 11:32 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Tue Jun 24, 11:57 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Paul E. McKenney, (Tue Jun 24, 12:12 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Tue Jun 24, 12:23 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Tue Jun 24, 2:01 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Nick Piggin, (Sun Jun 22, 11:56 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Fri Jun 20, 10:33 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Thu Jun 19, 4:31 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Thu Jun 19, 10:52 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Arjan van de Ven, (Wed Jun 18, 5:28 pm)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Ryan Hope, (Thu Jun 19, 10:45 am)
Re: [BUG] Lockless patches cause hardlock under heavy IO, Arjan van de Ven, (Thu Jun 19, 8:05 pm)