e9fdabfc2a
The majority of the calls to munmap a VMA is for a single vma. The maple tree is able to store a single entry at 0, with a size of 1 as a pointer and avoid any allocations. Change do_vmi_align_munmap() to store the VMAs being munmap()'ed into a tree indexed by the count. This will leverage the ability to store the first entry without a node allocation. Storing the entries into a tree by the count and not the vma start and end means changing the functions which iterate over the entries. Update unmap_vmas() and free_pgtables() to take a maple state and a tree end address to support this functionality. Passing through the same maple state to unmap_vmas() and free_pgtables() means the state needs to be reset between calls. This happens in the static unmap_region() and exit_mmap(). Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com> Link: https://lore.kernel.org/lkml/20230601021605.2823123-5-Liam.Howlett@oracle.com/ [surenb: skip changes passing maple state to unmap_vmas() and free_pgtables()] Bug: 274059236 Change-Id: If38cfecd51da884bcfdbdfdfbf955a0b338d3d60 Signed-off-by: Suren Baghdasaryan <surenb@google.com> |
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| clocksource | ||
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| keys | ||
| kunit | ||
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| linux | ||
| math-emu | ||
| media | ||
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| xen | ||
| OWNERS | ||