On 2010-Jul-15 16:25:51 +0000, Alan Cox <a...@freebsd.org> wrote: >Log: > Optimize pmap_remove()'s handling of PG_G mappings. Specifically, ... > calls pmap_invalidate_page(). Altogether, these changes eliminate 53% > of the TLB shootdowns for a "buildworld" on a ZFS file system. On > FFS, the reduction is 3%.
I have no feeling for the cost of a TLB shootdown. What is the likely impact on buildworld on a ZFS filesystem? Barely noticable or several percent faster? -- Peter Jeremy
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