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diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -1168,7 +1168,12 @@
}
if (nswbuf == 0) {
- nswbuf = min(nbuf / 4, 256);
+ /*
+ * Pager buffers are allocated for short periods, so scale the
+ * number of reserved buffers based on the number of CPUs rather
+ * than amount of memory.
+ */
+ nswbuf = min(nbuf / 4, 32 * mp_ncpus);
if (nswbuf < NSWBUF_MIN)
nswbuf = NSWBUF_MIN;
}

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