Displaying 4 results from an estimated 4 matches for "shadow_lock".
2005 May 11
4
Should shadow_lock be spin_lock_recursive?
During our testing, we found this code path where xen attempts to grab
the shadow_lock, while holding it - leading to a deadlock.
>> free_dom_mem->
>> shadow_sync_and_drop_references->
>> shadow_lock -> ..................... first lock
>> shadow_remove_all_access->
>> remove_all_access_in_page->
>> put_page->
>> free...
2009 Oct 23
11
soft lockups during live migrate..
...with 64GB running medium to heavy load
on xen 3.4.0, it is showing lot of soft lockups. The softlockups are
causing dom0 reboot by the cluster FS. The hardware has 256GB and 32
CPUs.
Looking into the hypervisor thru kdb, I see one cpu in sh_resync_all()
while all other 31 appear spinning on the shadow_lock. I vaguely remember
seeing some thread on this while ago, but just can''t seem to google find
it now. I''m trying to figure what could be done in the short run.
Now that guests are getting bigger in memory, bugs of this nature are slowly
popping up under medium/heavy load. I'...
2005 Dec 08
0
[PATCH]Don''t unshadow current used shadow L2 table.
...Node ID cc6e19224d0b755d24358cd15d1a40f894d320b4
# Parent b215584242c43415eccd008b90c812f3d04b398d
Don''t unshadow when the shadow l2 is the current used shadow table.
Otherwise, when destorying the domain, if the current sl2 is unpinned,
the shadow page will be freed without accquire the shadow_lock.
This may also improve the performance due to avoiding uncessary
unshadow.
Signed-off-by: Xiaofeng Ling <xiaofeng.ling@intel.com>
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2008 Feb 22
3
FW: [PATCH][UPDATE]Remove lock on guest table walk
Is there any trouble with mailing list? I didn''t see my mail sent back
after almost 8hrs. :-(
Thanks,
Kevin
-----Original Message-----
From: Tian, Kevin
Sent: 2008年2月22日 10:33
To: ''Tim Deegan''
Cc: xen-devel@lists.xensource.com
Subject: [PATCH][UPDATE]Remove lock on guest table walk
>From: Tim Deegan
>Sent: 2008年2月21日 22:13
>Hi,
>
>So, the idea seems