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sync code with last improvements from OpenBSD

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This commit is contained in:
purplerain 2023-11-11 01:29:48 +00:00
parent 5903cbe575
commit 62d64fa864
Signed by: purplerain
GPG key ID: F42C07F07E2E35B7
841 changed files with 83929 additions and 40755 deletions
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30
sys/uvm/uvm_swap.c
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@ -1,4 +1,4 @@
/* $OpenBSD: uvm_swap.c,v 1.166 2023/01/10 11:18:47 kettenis Exp $ */
/* $OpenBSD: uvm_swap.c,v 1.167 2023/10/27 19:18:53 mpi Exp $ */
/* $NetBSD: uvm_swap.c,v 1.40 2000/11/17 11:39:39 mrg Exp $ */
/*
@ -1516,8 +1516,30 @@ ReTry: /* XXXMRG */
}
/*
* uvm_swapisfull: return true if all of available swap is allocated
* and in use.
* uvm_swapisfilled: return true if the amount of free space in swap is
* smaller than the size of a cluster.
*
* As long as some swap slots are being used by pages currently in memory,
* it is possible to reuse them. Even if the swap space has been completly
* filled we do not consider it full.
*/
int
uvm_swapisfilled(void)
{
int result;
mtx_enter(&uvm_swap_data_lock);
KASSERT(uvmexp.swpginuse <= uvmexp.swpages);
result = (uvmexp.swpginuse + SWCLUSTPAGES) >= uvmexp.swpages;
mtx_leave(&uvm_swap_data_lock);
return result;
}
/*
* uvm_swapisfull: return true if the amount of pages only in swap
* accounts for more than 99% of the total swap space.
*
*/
int
uvm_swapisfull(void)
@ -1526,7 +1548,7 @@ uvm_swapisfull(void)
mtx_enter(&uvm_swap_data_lock);
KASSERT(uvmexp.swpgonly <= uvmexp.swpages);
result = (uvmexp.swpgonly == uvmexp.swpages);
result = (uvmexp.swpgonly >= (uvmexp.swpages * 99 / 100));
mtx_leave(&uvm_swap_data_lock);
return result;