Your message dated Sat, 05 Apr 2008 07:52:17 +0000
with message-id <[EMAIL PROTECTED]>
and subject line Bug#471427: fixed in linux-2.6 2.6.18.dfsg.1-19
has caused the Debian Bug report #471427,
regarding [ia64] fix multithread/nfs corruption
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact [EMAIL PROTECTED]
immediately.)
--
471427: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=471427
Debian Bug Tracking System
Contact [EMAIL PROTECTED] with problems
--- Begin Message ---
Package: linux-2.6
Version: 2.6.18.dfsg.1-18etch1
Severity: important
Tags: patch
This issue was originally reported to LKML here:
http://www.gelato.unsw.edu.au/archives/linux-ia64/0704/20323.html
This problem was eventually fixed upstream, but the patch was quite
invasive. The fix originally proposed (moving the lazy_mmu_prot_update
call) is believed to sufficiently resolve the issue. This fix, along
with a similar fix for migrate.c, was picked up by the RHEL kernels
(attached). I suggest including this fix in stable.
--
dann frazier
From: Luming Yu <[EMAIL PROTECTED]>
Subject: [RHEL 5.1 PATCH] BZ 253356: [EL5][BUG] Unexpected SIGILL on
NFS/Montecito(ia64)
Date: Fri, 24 Aug 2007 21:49:48 +0800
Bugzilla: 253356
Message-Id: <[EMAIL PROTECTED]>
Changelog: [mm] ia64: flush i-cache before set_pte
BZ 253356
Description of problem:
>Consider multi-thread...thread A and B on cpu0 and cpu1.
>And assume NFS's rpc client works on cpu1 and copies contents of the
>page on cpu1.
>
>following is a case I can imagine.
>==
> --cpu0-- --cpu1--
>(A)page_fault
>(A)do no pag
>(A)do NFS request/
>(A)wait for new page-cache
> (NFS) recieve answer from server.
> copy pages. //D-cache of cpu1 is dirty
>(A)got new page.
>(A)set_pte_at()
> (B) access new page. "pte is already set."
>here.
> no page fault.
>(A)flush_icache()(slow!) (B) exec page and SIGILL.
>==
>>>> > For understanding, you have to understand how Montecito's cache works.
>>>> >
>>>> > Because L2-Dcache to L3-mixed-cache is *write-back*. Thera are time
>>>> > when a new data in L2-Dcache is not synchronized with data in
>>>L3-mixed-cache.
>>>> > During this inconsistent time, L2-Icache miss will fetch wrong
>>>instruction > > from L3-mixed-cache.
>>>> >
>>>> > cpu1 does this. *new hot data* on L2-Dcache (by NFS's RPC page fill)
>>>and
>>>> > L3-mixed cache has stale data. L2-Dcache and L3-mixed-cache should be
>>>synched
>>>> > before L2-Icache looks up L3-mixed-cache.
>>>> >
>>>> > Because fc instruction makes L2-Dcache and L3-mixed-cache consistent
>>>(by invalidation),
>>>> > flush cache before set_pte() fixes the problem.
>>>> >
>>>> >
>>>
>>> Hmmm, interesting. The NFS's RPC page is still not actually filled with
>>> valid data before it gets returned
>>> from vma->vm_ops->nopage in do_no_page.
>>
>
>Just cache is not coherent.
>
>
>>> Do you think we need to fix this problem too?
>>
>
>No. most of the cpus doesn't need cache flush at NFS's RPC page fill.
>And fix in NFS is already denied.
>
>
>>> Probably we need to make sure NFS's RPC page contains validate data
>>> before it can be used in page fault
>>> handler. That would be more generic and less invasive to red hat kernel.
>>>
>>
>For redhat kernel,
>moving lazy_mmu_prot_update() before set_pet() is the simplest,
>for fixing NFS problem, I think. (But I'm not sure there are more unknown
>case or not.)
>
>
Upstream status:
Following 3 patches are in -mm kernel
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/broken-out/flush-icache-before-set_pte-on-ia64-flush-icache-at-set_pte.patch
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/broken-out/flush-icache-before-set_pte-on-ia64-flush-icache-at-set_pte-fix.patch
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc3/2.6.23-rc3-mm1/broken-out/flush-icache-before-set_pte-on-ia64-flush-icache-at-set_pte-fix-update.patch
The following back port is prepared by the original author of the upstream
patch set. I reviewed and tested the back port
version which looks less invasive to red hat el5.1 kernel for fixing the
problem. The only concern of this back port is that I'm worried that some
cases that I don't know could be missed. So please help review, test and
ACK.
Thanks,
Luming
Fix Montecito's problem just by moving lazy_mmu_prot_update().
* Fixes do_no_page() case.
* Fixes page migration.
-Kame
==
diff -Nru linux-2.6.18.ia64/mm/memory.c mylinux-2.6.18.ia64/mm/memory.c
--- linux-2.6.18.ia64/mm/memory.c 2007-08-24 19:14:11.000000000 +0900
+++ mylinux-2.6.18.ia64/mm/memory.c 2007-08-24 19:46:33.000000000 +0900
@@ -2371,6 +2371,7 @@
entry = mk_pte(new_page, vma->vm_page_prot);
if (write_access)
entry = maybe_mkwrite(pte_mkdirty(entry), vma);
+ lazy_mmu_prot_update(entry);
set_pte_at(mm, address, page_table, entry);
if (anon) {
inc_mm_counter(mm, anon_rss);
@@ -2392,7 +2393,6 @@
/* no need to invalidate: a not-present page shouldn't be cached */
update_mmu_cache(vma, address, entry);
- lazy_mmu_prot_update(entry);
unlock:
pte_unmap_unlock(page_table, ptl);
if (dirty_page) {
diff -Nru linux-2.6.18.ia64/mm/migrate.c mylinux-2.6.18.ia64/mm/migrate.c
--- linux-2.6.18.ia64/mm/migrate.c 2007-08-24 19:14:03.000000000 +0900
+++ mylinux-2.6.18.ia64/mm/migrate.c 2007-08-24 19:48:27.000000000 +0900
@@ -172,6 +172,7 @@
pte = pte_mkold(mk_pte(new, vma->vm_page_prot));
if (is_write_migration_entry(entry))
pte = pte_mkwrite(pte);
+ lazy_mmu_prot_update(pte);
set_pte_at(mm, addr, ptep, pte);
if (PageAnon(new))
@@ -181,7 +182,6 @@
/* No need to invalidate - it was non-present before */
update_mmu_cache(vma, addr, pte);
- lazy_mmu_prot_update(pte);
out:
pte_unmap_unlock(ptep, ptl);
--- End Message ---
--- Begin Message ---
Source: linux-2.6
Source-Version: 2.6.18.dfsg.1-19
We believe that the bug you reported is fixed in the latest version of
linux-2.6, which is due to be installed in the Debian FTP archive:
linux-2.6_2.6.18.dfsg.1-19.diff.gz
to pool/main/l/linux-2.6/linux-2.6_2.6.18.dfsg.1-19.diff.gz
linux-2.6_2.6.18.dfsg.1-19.dsc
to pool/main/l/linux-2.6/linux-2.6_2.6.18.dfsg.1-19.dsc
linux-doc-2.6.18_2.6.18.dfsg.1-19_all.deb
to pool/main/l/linux-2.6/linux-doc-2.6.18_2.6.18.dfsg.1-19_all.deb
linux-headers-2.6.18-6-all-ia64_2.6.18.dfsg.1-19_ia64.deb
to
pool/main/l/linux-2.6/linux-headers-2.6.18-6-all-ia64_2.6.18.dfsg.1-19_ia64.deb
linux-headers-2.6.18-6-all_2.6.18.dfsg.1-19_ia64.deb
to pool/main/l/linux-2.6/linux-headers-2.6.18-6-all_2.6.18.dfsg.1-19_ia64.deb
linux-headers-2.6.18-6-itanium_2.6.18.dfsg.1-19_ia64.deb
to
pool/main/l/linux-2.6/linux-headers-2.6.18-6-itanium_2.6.18.dfsg.1-19_ia64.deb
linux-headers-2.6.18-6-mckinley_2.6.18.dfsg.1-19_ia64.deb
to
pool/main/l/linux-2.6/linux-headers-2.6.18-6-mckinley_2.6.18.dfsg.1-19_ia64.deb
linux-headers-2.6.18-6_2.6.18.dfsg.1-19_ia64.deb
to pool/main/l/linux-2.6/linux-headers-2.6.18-6_2.6.18.dfsg.1-19_ia64.deb
linux-image-2.6.18-6-itanium_2.6.18.dfsg.1-19_ia64.deb
to
pool/main/l/linux-2.6/linux-image-2.6.18-6-itanium_2.6.18.dfsg.1-19_ia64.deb
linux-image-2.6.18-6-mckinley_2.6.18.dfsg.1-19_ia64.deb
to
pool/main/l/linux-2.6/linux-image-2.6.18-6-mckinley_2.6.18.dfsg.1-19_ia64.deb
linux-manual-2.6.18_2.6.18.dfsg.1-19_all.deb
to pool/main/l/linux-2.6/linux-manual-2.6.18_2.6.18.dfsg.1-19_all.deb
linux-patch-debian-2.6.18_2.6.18.dfsg.1-19_all.deb
to pool/main/l/linux-2.6/linux-patch-debian-2.6.18_2.6.18.dfsg.1-19_all.deb
linux-source-2.6.18_2.6.18.dfsg.1-19_all.deb
to pool/main/l/linux-2.6/linux-source-2.6.18_2.6.18.dfsg.1-19_all.deb
linux-support-2.6.18-6_2.6.18.dfsg.1-19_all.deb
to pool/main/l/linux-2.6/linux-support-2.6.18-6_2.6.18.dfsg.1-19_all.deb
linux-tree-2.6.18_2.6.18.dfsg.1-19_all.deb
to pool/main/l/linux-2.6/linux-tree-2.6.18_2.6.18.dfsg.1-19_all.deb
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [EMAIL PROTECTED],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
dann frazier <[EMAIL PROTECTED]> (supplier of updated linux-2.6 package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [EMAIL PROTECTED])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Format: 1.7
Date: Thu, 03 Apr 2008 16:22:55 -0600
Source: linux-2.6
Binary: linux-image-2.6.18-6-vserver-powerpc linux-image-2.6.18-6-sparc32
linux-headers-2.6.18-6-r4k-kn04 linux-image-2.6.18-6-s390x
linux-headers-2.6.18-6-r4k-ip22 linux-headers-2.6.18-6-xen-vserver-686
linux-headers-2.6.18-6-alpha-legacy linux-modules-2.6.18-6-xen-686
linux-headers-2.6.18-6-alpha-generic linux-headers-2.6.18-6-powerpc-miboot
linux-headers-2.6.18-6-all-mips linux-image-2.6.18-6-r4k-ip22
linux-headers-2.6.18-6-powerpc-smp linux-headers-2.6.18-6-vserver-k7
xen-linux-system-2.6.18-6-xen-amd64 linux-manual-2.6.18
linux-image-2.6.18-6-footbridge linux-image-2.6.18-6-parisc-smp
linux-image-2.6.18-6-s390 linux-image-2.6.18-6-xen-686
linux-image-2.6.18-6-amd64 linux-image-2.6.18-6-powerpc-miboot
linux-headers-2.6.18-6-qemu linux-headers-2.6.18-6-mac
linux-image-2.6.18-6-powerpc-smp linux-headers-2.6.18-6-rpc
linux-image-2.6.18-6-xen-amd64 linux-headers-2.6.18-6-r5k-cobalt
linux-headers-2.6.18-6-itanium linux-image-2.6.18-6-itanium
linux-headers-2.6.18-6-vserver-sparc64 linux-image-2.6.18-6-powerpc
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linux-image-2.6.18-6-parisc64-smp linux-headers-2.6.18-6-iop32x
linux-image-2.6.18-6-sparc64-smp linux-image-2.6.18-6-686-bigmem
linux-headers-2.6.18-6-all-mipsel linux-headers-2.6.18-6-all-ia64
linux-headers-2.6.18-6-ixp4xx linux-image-2.6.18-6-amiga
linux-headers-2.6.18-6-all-m68k linux-image-2.6.18-6-r3k-kn02
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linux-image-2.6.18-6-mac xen-linux-system-2.6.18-6-xen-686
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linux-image-2.6.18-6-powerpc64 linux-headers-2.6.18-6-vserver-powerpc64
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linux-headers-2.6.18-6-all-powerpc linux-image-2.6.18-6-486
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linux-headers-2.6.18-6-all-i386 linux-headers-2.6.18-6-parisc
linux-headers-2.6.18-6-s390 linux-headers-2.6.18-6-vserver
linux-image-2.6.18-6-ixp4xx linux-headers-2.6.18-6-486
linux-headers-2.6.18-6-all-s390
Architecture: source ia64 all
Version: 2.6.18.dfsg.1-19
Distribution: stable
Urgency: high
Maintainer: Debian Kernel Team <[email protected]>
Changed-By: dann frazier <[EMAIL PROTECTED]>
Description:
linux-doc-2.6.18 - Linux kernel specific documentation for version 2.6.18
linux-headers-2.6.18-6 - Common header files for Linux 2.6.18
linux-headers-2.6.18-6-all - All header files for Linux 2.6.18
linux-headers-2.6.18-6-all-ia64 - All header files for Linux 2.6.18
linux-headers-2.6.18-6-itanium - Header files for Linux 2.6.18 on Itanium
linux-headers-2.6.18-6-mckinley - Header files for Linux 2.6.18 on Itanium II
linux-image-2.6.18-6-itanium - Linux 2.6.18 image on Itanium
linux-image-2.6.18-6-mckinley - Linux 2.6.18 image on Itanium II
linux-manual-2.6.18 - Linux kernel API manual pages for version 2.6.18
linux-patch-debian-2.6.18 - Debian patches to version 2.6.18 of the Linux
kernel
linux-source-2.6.18 - Linux kernel source for version 2.6.18 with Debian
patches
linux-support-2.6.18-6 - Support files for Linux 2.6.18
linux-tree-2.6.18 - Linux kernel source tree for building Debian kernel images
Closes: 466401 469058 470719 471427 473824
Changes:
linux-2.6 (2.6.18.dfsg.1-19) stable; urgency=high
.
[ Martin Michlmayr ]
* [mips] Enable UART on RaQ1 (closes: #473824).
.
[ dann frazier ]
* e1000: Add PCI-IDs for 82571EB 4-port cards (closes: #466401).
* Fix potential nfs write corruption (closes: #470719)
* [ia64] Fix multi-thread/nfs text corruption (closes: #471427).
.
[ Bastian Blank ]
* [i386/amd64] Clear DF before calling signal handler. (closes: #469058)
Files:
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linux-2.6_2.6.18.dfsg.1-19.dsc
d1ed973e192795b55ab4d2867917fcee 5384246 devel optional
linux-2.6_2.6.18.dfsg.1-19.diff.gz
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linux-doc-2.6.18_2.6.18.dfsg.1-19_all.deb
879d589774fe1c33b6b848289a6e6d83 1085018 doc optional
linux-manual-2.6.18_2.6.18.dfsg.1-19_all.deb
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linux-patch-debian-2.6.18_2.6.18.dfsg.1-19_all.deb
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linux-source-2.6.18_2.6.18.dfsg.1-19_all.deb
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linux-support-2.6.18-6_2.6.18.dfsg.1-19_all.deb
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linux-tree-2.6.18_2.6.18.dfsg.1-19_all.deb
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linux-headers-2.6.18-6-all_2.6.18.dfsg.1-19_ia64.deb
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