Author: maxim
Date: Sat Feb 25 12:06:40 2012
New Revision: 232156
URL: http://svn.freebsd.org/changeset/base/232156
Log:
o Reduce chances for integer overflow.
o More verbose sysctl description added.
MFC after: 2 weeks
Sponsored by: Nginx, Inc.
Modified:
head/sys/kern/vfs_cache.c
Modified: head/sys/kern/vfs_cache.c
==============================================================================
--- head/sys/kern/vfs_cache.c Sat Feb 25 11:07:32 2012 (r232155)
+++ head/sys/kern/vfs_cache.c Sat Feb 25 12:06:40 2012 (r232156)
@@ -369,7 +369,7 @@ sysctl_debug_hashstat_nchash(SYSCTL_HAND
maxlength = count;
}
n_nchash = nchash + 1;
- pct = (used * 100 * 100) / n_nchash;
+ pct = (used * 100) / (n_nchash / 100);
error = SYSCTL_OUT(req, &n_nchash, sizeof(n_nchash));
if (error)
return (error);
@@ -386,7 +386,7 @@ sysctl_debug_hashstat_nchash(SYSCTL_HAND
}
SYSCTL_PROC(_debug_hashstat, OID_AUTO, nchash, CTLTYPE_INT|CTLFLAG_RD|
CTLFLAG_MPSAFE, 0, 0, sysctl_debug_hashstat_nchash, "I",
- "nchash chain lengths");
+ "nchash statistics (number of total/used buckets, maximum chain length,
usage percentage)");
#endif
/*
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