[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] LVM Snapshot Troubles
I've been looking into the LVM snapshot/memory allocation troubles and will try to come up with a fix. FYI: In doing more searching for information about the problem, I did come across this: http://www.redhat.com/archives/dm-devel/2004-January/msg00068.html "The problem seems to be that dm-ioctl-v4.c sets the PF_MEMALLOC flag for the current process. Lookaing at the memory allocator (__alloc_page) this means that the VM will think the memory allocation is already running (and this is a recursion) so it will not try to free pages / rebalance page or whatever." ... I'm looking into sharing memory between the snapshots instead of giving each snapshot its own private allocation of pages for I/O. (As I'd like to scale to a large number of snapshots, and don't want to need >1 MB of kernel memory per snapshot.) --Michael Vrable ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/xen-devel
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