15e6194107
These diffs implement the first stage of a VOP_{GET|PUT}PAGES pushdown for local media FS's. See ffs_putpages in /sys/ufs/ufs/ufs_readwrite.c for implementation details for generic *_{get|put}pages for local media FS's. Support is trivial to add for any FS that formerly relied on the default behaviour of the vnode_pager in in EOPNOTSUPP cases (just copy the ffs_getpages() code for the FS in question's *_{get|put}pages). Obviously, it would be better if each local media FS implemented a more optimal method, instead of calling an exported interface from the /sys/vm/vnode_pager.c, but this is a necessary first step in getting the FS's to a point where they can be supplied with better implementations on a case-by-case basis. Obviously, the cd9660_putpages() can be rather trivial (since it is a read-only FS type 8-)). A slight (temporary) modification is made to print a diagnostic message in the case where the underlying filesystem attempts to engage in the previous behaviour. Failure is likely to be ungraceful. Submitted by: terry@freebsd.org (Terry Lambert) |
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