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Now the discussion moves to kernel space, I move the email from ocfs2-tools-devel to ocfs2-devel. The original discussion can be found from http://oss.oracle.com/pipermail/ocfs2-tools-devel/2009-June/001891.html Joel Becker Wrote: > On Sat, Jun 27, 2009 at 03:46:04AM +0800, Coly Li wrote: >> Joel Becker Wrote: >>> On Sat, Jun 27, 2009 at 03:00:05AM +0800, Coly Li wrote: >>

David, So here are the two patches. Remove all patches that you have and apply these. The first one is straight forward. The second one will hopefully fix the livelock issue you have been encountering. People reviewing the patches should note that the second one is slightly different than the one I posted earlier. It removes the BUG_ON in the if condition where we jump to update_holders. The

fyi -------------- next part -------------- An embedded message was scrubbed... From: David Teigland <teigland at redhat.com> Subject: Re: [PATCH] ocfs2: Do not downconvert if the lock level is already compatible Date: Fri, 29 Jan 2010 16:21:02 -0600 Size: 5349 Url: http://oss.oracle.com/pipermail/ocfs2-devel/attachments/20100129/07ea15ec/attachment.eml

If I start ocfs2_controld.cman in parallel on a few nodes, only one of them starts up, the others exit with one of these errors: call_section_read at 370: Reading from section "daemon_protocol" on checkpoint "ocfs2:controld" (try 1) call_section_read at 387: Checkpoint "ocfs2:controld" does not have a section named "daemon_protocol" call_section_read at

This patch plugs a race between the downconvert thread and an unlock ast message. Specifically, after the downconvert worker has done its task, the dc thread needs to check whether an unlock ast made the downconvert moot. Reported-by: David Teigland <teigland at redhat.com> Signed-off-by: Sunil Mushran <sunil.mushran at oracle.com> Acked-by: Mark Fasheh <mfasheh at sus.com> --- fs/ocfs2/dlmglue.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index 1c4d704....

Found 15 patches (out of 162) that appeared relevant to ocfs2 1.4. Please review. Sunil

...Sat Aug 15 2009 Jiri Pirko <jpirko at redhat.com> [2.6.18-128.6.1.el5] - - [net] make sock_sendpage use kernel_sendpage (Jiri Pirko ) [517445 516955] {CVE-2009-2692} * Tue Aug 04 2009 Jiri Pirko <jpirko at redhat.com> [2.6.18-128.5.1.el5] - - [dlm] free socket in error exit path (David Teigland ) [515432 508829] It'd be nice to try the Red Hat kernel to see if it is a CentOS specific glitch or not, but I suspect it isn't. Can't do that easily unfortunately. Are there existing CentOS builds of the 128.5/128.6 kernels archived somewhere? I had a quick scan through Red Hat a...

...# cat /sys/kernel/config/cluster/CLUSTER/fence_method panic The bug fixes can be classified under three groupings. The first group involves cluster locking. Specifically in the area of downconverting cluster locks. The links below explain two of the more interesting problems. Our thanks to David Teigland of Red Hat for helping us fix these problems. http://oss.oracle.com/git/?p=ocfs2-1.4.git;a=commit;h=e8ef96c444326e4262fd371729e7beebda1af4d1 http://oss.oracle.com/git/?p=ocfs2-1.4.git;a=commit;h=39febfd5ee7948c018b667e0b909886e1cfa1235 The second group of bug fixes concern NFS support. This releas...

Hi Konrad, I just tried to boot a 3.8.0-rc0 kernel (last commit: 7313264b899bbf3988841296265a6e0e8a7b6521) as dom0 on my machine with current xen-unstable. The boot stalls: [ 0.000000] ACPI: PM-Timer IO Port: 0x808 [ 0.000000] ACPI: Local APIC address 0xfee00000 [ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01]

Using fsdlm/ocfs2_controld.cman, I've rerun the test I've been having problems with on 2.6.30-rc1. After running for several minutes in the same directory on three nodes, the test hangs, and I collect the following information: bull-01 ------- 3053 S< [ocfs2dc] ocfs2_downconvert_thread 3054 S< [dlm_astd] dlm_astd 3055 S< [dlm_scand]

This email is also sent to cluster-devel at redhat.com. Since this issue is about both dlm and ocfs2, I send the email here to look for help from upstream. This is an already known issue. on ocfs2 with user space cluster stack, run the test script from http://people.redhat.com/~teigland/make_panic on the mounted ocfs2 volume from 2 nodes simultaneously, the access to ocfs2 volume on both nodes will get hung. This issue also described in Novell bugzilla #492055 (https://bugzilla.novell.com/show_bug.cgi?id=492055). Now on upstream kernel, the dead-hang is not reproduced. But the ac...

...(including fs/ocfs2/dlm, also referred to as "o2dlm") or the new "user" cluster stack. The "user" cluster stack requires a userspace component to communicate node membership information to the file system via a misc device. In "user" cluster stack mode, Dave Teigland's dlm (fs/dlm) is used as it already contains a cluster stack agnostic userspace API. This all has several benefits. The most obvious is that we now get to share code and maintenance cost with other cluster-related projects instead of re-implementing cluster and dlm features in parallel. Addit...

Please review the list of patches being applied to the ocfs2 1.4 tree. All patches list the mainline commit hash. Thanks Sunil

...;davem@tempietto.lan> David Safford <safford@linux.vnet.ibm.com> David Sharp <dhsharp@google.com> David Smith <dsmith@redhat.com> David Spinadel <david.spinadel@intel.com> David Sterba <dsterba@suse.cz> David Stevenson <david@avoncliff.com> David Teigland <teigland@redhat.com> David Turvene <dturvene@dahetral.com> David Vrabel <david.vrabel@citrix.com> David Ward <david.ward@ll.mit.edu> David Woodhouse <David.Woodhouse@intel.com> David Woodhouse <dwmw2@infradead.org> David Zafman <david.zafman@inkta...

...;davem@tempietto.lan> David Safford <safford@linux.vnet.ibm.com> David Sharp <dhsharp@google.com> David Smith <dsmith@redhat.com> David Spinadel <david.spinadel@intel.com> David Sterba <dsterba@suse.cz> David Stevenson <david@avoncliff.com> David Teigland <teigland@redhat.com> David Turvene <dturvene@dahetral.com> David Vrabel <david.vrabel@citrix.com> David Ward <david.ward@ll.mit.edu> David Woodhouse <David.Woodhouse@intel.com> David Woodhouse <dwmw2@infradead.org> David Zafman <david.zafman@inkta...

...;davem@tempietto.lan> David Safford <safford@linux.vnet.ibm.com> David Sharp <dhsharp@google.com> David Smith <dsmith@redhat.com> David Spinadel <david.spinadel@intel.com> David Sterba <dsterba@suse.cz> David Stevenson <david@avoncliff.com> David Teigland <teigland@redhat.com> David Turvene <dturvene@dahetral.com> David Vrabel <david.vrabel@citrix.com> David Ward <david.ward@ll.mit.edu> David Woodhouse <David.Woodhouse@intel.com> David Woodhouse <dwmw2@infradead.org> David Zafman <david.zafman@inkta...

...;davem@tempietto.lan> David Safford <safford@linux.vnet.ibm.com> David Sharp <dhsharp@google.com> David Smith <dsmith@redhat.com> David Spinadel <david.spinadel@intel.com> David Sterba <dsterba@suse.cz> David Stevenson <david@avoncliff.com> David Teigland <teigland@redhat.com> David Turvene <dturvene@dahetral.com> David Vrabel <david.vrabel@citrix.com> David Ward <david.ward@ll.mit.edu> David Woodhouse <David.Woodhouse@intel.com> David Woodhouse <dwmw2@infradead.org> David Zafman <david.zafman@inkta...

...;davem@tempietto.lan> David Safford <safford@linux.vnet.ibm.com> David Sharp <dhsharp@google.com> David Smith <dsmith@redhat.com> David Spinadel <david.spinadel@intel.com> David Sterba <dsterba@suse.cz> David Stevenson <david@avoncliff.com> David Teigland <teigland@redhat.com> David Turvene <dturvene@dahetral.com> David Vrabel <david.vrabel@citrix.com> David Ward <david.ward@ll.mit.edu> David Woodhouse <David.Woodhouse@intel.com> David Woodhouse <dwmw2@infradead.org> David Zafman <david.zafman@inkta...

...;davem@tempietto.lan> David Safford <safford@linux.vnet.ibm.com> David Sharp <dhsharp@google.com> David Smith <dsmith@redhat.com> David Spinadel <david.spinadel@intel.com> David Sterba <dsterba@suse.cz> David Stevenson <david@avoncliff.com> David Teigland <teigland@redhat.com> David Turvene <dturvene@dahetral.com> David Vrabel <david.vrabel@citrix.com> David Ward <david.ward@ll.mit.edu> David Woodhouse <David.Woodhouse@intel.com> David Woodhouse <dwmw2@infradead.org> David Zafman <david.zafman@inkta...

...;davem@tempietto.lan> David Safford <safford@linux.vnet.ibm.com> David Sharp <dhsharp@google.com> David Smith <dsmith@redhat.com> David Spinadel <david.spinadel@intel.com> David Sterba <dsterba@suse.cz> David Stevenson <david@avoncliff.com> David Teigland <teigland@redhat.com> David Turvene <dturvene@dahetral.com> David Vrabel <david.vrabel@citrix.com> David Ward <david.ward@ll.mit.edu> David Woodhouse <David.Woodhouse@intel.com> David Woodhouse <dwmw2@infradead.org> David Zafman <david.zafman@inkta...