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vfs: use a dedicated counter for free vnode recycling

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Otherwise vlrureclaim activitity is mixed in and it is hard to tell which
vnodes got reclaimed.
This commit is contained in:
Mateusz Guzik 2020-01-07 15:42:01 +00:00
parent 76c6e771bc
commit c92fe112a7
1 changed files with 6 additions and 1 deletions
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7
sys/kern/vfs_subr.c
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@ -204,6 +204,10 @@ static counter_u64_t recycles_count;
SYSCTL_COUNTER_U64(_vfs, OID_AUTO, recycles, CTLFLAG_RD, &recycles_count, SYSCTL_COUNTER_U64(_vfs, OID_AUTO, recycles, CTLFLAG_RD, &recycles_count,
"Number of vnodes recycled to meet vnode cache targets"); "Number of vnodes recycled to meet vnode cache targets");
static counter_u64_t recycles_free_count;
SYSCTL_COUNTER_U64(_vfs, OID_AUTO, recycles_free, CTLFLAG_RD, &recycles_free_count,
"Number of free vnodes recycled to meet vnode cache targets");
/* /*
* Various variables used for debugging the new implementation of * Various variables used for debugging the new implementation of
* reassignbuf(). * reassignbuf().
@ -603,6 +607,7 @@ vntblinit(void *dummy __unused)
vnodes_created = counter_u64_alloc(M_WAITOK); vnodes_created = counter_u64_alloc(M_WAITOK);
recycles_count = counter_u64_alloc(M_WAITOK); recycles_count = counter_u64_alloc(M_WAITOK);
recycles_free_count = counter_u64_alloc(M_WAITOK);
free_owe_inact = counter_u64_alloc(M_WAITOK); free_owe_inact = counter_u64_alloc(M_WAITOK);
/* /*
@ -1466,7 +1471,7 @@ vtryrecycle(struct vnode *vp)
return (EBUSY); return (EBUSY);
} }
if (!VN_IS_DOOMED(vp)) { if (!VN_IS_DOOMED(vp)) {
counter_u64_add(recycles_count, 1); counter_u64_add(recycles_free_count, 1);
vgonel(vp); vgonel(vp);
} }
VOP_UNLOCK(vp); VOP_UNLOCK(vp);