hugepage_subpool_put_pages

Name:Subpool accounting for freeing and unreserving pages.* Return the number of global page reservations that must be dropped.* The return value may only be different than the passed value (delta)* in the case where a subpool minimum size must be maintained.

Proto:static long hugepage_subpool_put_pages(struct hugepage_subpool *spool, long delta)

Type:long

Parameter:

Type	Parameter	Name
struct hugepage_subpool *	spool
long	delta

182

184

If Not spool Then Return delta

187

spin_lock( & lock)

189

If Maximum huge pages or -1 if no maximum. != -1 Then Used count against maximum, includes -= delta

193

If Minimum huge pages or -1 if no minimum. != -1 && Used count against maximum, includes < Minimum huge pages or -1 if no minimum. Then

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If Pages reserved against global pool to + delta <= Minimum huge pages or -1 if no minimum. Then ret = 0

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Else ret = Pages reserved against global pool to + delta - Minimum huge pages or -1 if no minimum.

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Pages reserved against global pool to += delta

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If Pages reserved against global pool to > Minimum huge pages or -1 if no minimum. Then Pages reserved against global pool to = Minimum huge pages or -1 if no minimum.

208

unlock_or_release_subpool(spool)

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Return ret

**Caller**
Name	Describe
__free_huge_page
alloc_huge_page
hugetlb_vm_op_close
hugetlb_reserve_pages
hugetlb_unreserve_pages

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