On Wed, 2011-08-17 at 22:57 -0400, Joe Landman wrote: > The lustre client (and most NFS or even network block devices) all do > memory allocation of buffers ... which is anathema to migrating pages > out to disk. You can easily wind up in a "death spiral" race condition > (and it sounds like you are there). You might be able to do something > with iSCSI or SRP (though these also do block allocations and could > trigger death spirals).
Your post is generally correct, but minor nit here: there is no memory allocation on the command path of the Linux SRP initiator, so the death spiral is not possible there. I suspect the iSCSI initiator takes similar precautions -- or uses mempools -- to avoid this fate, but I'm not as familiar with that code. Cheers, Dave _______________________________________________ Lustre-discuss mailing list Lustre-discuss@lists.lustre.org http://lists.lustre.org/mailman/listinfo/lustre-discuss
