Change Details

This fixes tmpfs scanning all vnodes in order to manage mtime for memory mappings, almost always finding nothing to do. This is of huge importance when e.g., running poudriere with tmpfs-based worlds. I don't know if decoupling OBJT_SWAP from tmpfs is viable. The new OBJ_TMPFS_VREF flag is added to allow asserting on the reference not being there.

This fixes tmpfs scanning all vnodes in order to manage mtime for memory mappings, almost always finding nothing to do. This is of huge importance when e.g., running poudriere with tmpfs-based worlds. I don't know if decoupling OBJT_SWAP from tmpfs is viable. The new OBJ_TMPFS_VREF flag is added to allow asserting on the reference not being there. Sample result from stock kernel running tinderbox in a tmpfs-only environment: > tmpfs_update_mtime: called for mp 0xfffffe032c6ce080 ; 0 lazy size; 8 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe064c2fe040 ; 0 lazy size; 152056 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe032c6ce080 ; 0 lazy size; 8 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe064c2fe040 ; 0 lazy size; 224955 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe032c6ce080 ; 0 lazy size; 8 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe064c2fe040 ; 0 lazy size; 254417 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe032c6ce080 ; 0 lazy size; 8 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe064c2fe040 ; 0 lazy size; 284780 inspected; 0 were dirty Patched kernel almost never catches anything.

This fixes tmpfs scanning all vnodes in order to manage mtime for memory mappings, almost always finding nothing to do. This is of huge importance when e.g., running poudriere with tmpfs-based worlds. I don't know if decoupling OBJT_SWAP from tmpfs is viable. The new OBJ_TMPFS_VREF flag is added to allow asserting on the reference not being there. Sample result from stock kernel running tinderbox in a tmpfs-only environment: > tmpfs_update_mtime: called for mp 0xfffffe032c6ce080 ; 0 lazy size; 8 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe064c2fe040 ; 0 lazy size; 152056 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe032c6ce080 ; 0 lazy size; 8 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe064c2fe040 ; 0 lazy size; 224955 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe032c6ce080 ; 0 lazy size; 8 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe064c2fe040 ; 0 lazy size; 254417 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe032c6ce080 ; 0 lazy size; 8 inspected; 0 were dirty > tmpfs_update_mtime: called for mp 0xfffffe064c2fe040 ; 0 lazy size; 284780 inspected; 0 were dirty Patched kernel almost never catches anything.