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Richard Yao
f90096c905
The resolution of issue #31 made KM_PUSHPAGE imply GFP_NOFS. This was done to prevent situations where filesystem operations which are holding locks enter direct reclaim and attempt to reaquire those same locks. This clearly will result in a deadlock. This works for datasets which are implemented in terms for filesystem operations. But unfortunately, swapping to a zvol will encounter many of the same deadlocks and GFP_NOFS will not prevent this. As such, it is appropriate to extend KM_PUSHPAGE to use the broader GFP_NOIO mask to handle these non-filesystem cases. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue zfsonlinux/zfs#342 Closes #105