Correctly handle preemption of pmap_update_pde_invalidate().
X-MFC after: r205573
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=205778
@ -880,9 +880,12 @@ pmap_update_pde_invalidate(vm_offset_t va, pd_entry_t newpde)
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load_cr4(cr4 & ~CR4_PGE);
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/*
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* Although preemption at this point could be detrimental to
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* performance, it would not lead to an error.
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* performance, it would not lead to an error. PG_G is simply
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* ignored if CR4.PGE is clear. Moreover, in case this block
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* is re-entered, the load_cr4() either above or below will
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* modify CR4.PGE flushing the TLB.
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*/
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load_cr4(cr4);
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load_cr4(cr4 | CR4_PGE);
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}
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}
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#ifdef SMP
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@ -917,9 +917,12 @@ pmap_update_pde_invalidate(vm_offset_t va, pd_entry_t newpde)
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load_cr4(cr4 & ~CR4_PGE);
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/*
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* Although preemption at this point could be detrimental to
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* performance, it would not lead to an error.
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* performance, it would not lead to an error. PG_G is simply
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* ignored if CR4.PGE is clear. Moreover, in case this block
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* is re-entered, the load_cr4() either above or below will
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* modify CR4.PGE flushing the TLB.
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*/
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load_cr4(cr4);
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load_cr4(cr4 | CR4_PGE);
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}
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}
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#ifdef SMP
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