nmeter: increase maximum /proc file size (needed for large machines)

function                                             old     new   delta
get_file                                             185     201     +16

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/procps/nmeter.c b/procps/nmeter.c
index 68e6f3325..e52c868df 100644
--- a/procps/nmeter.c
+++ b/procps/nmeter.c
@@ -59,9 +59,9 @@
 
 typedef unsigned long long ullong;
 
-enum {  /* Preferably use powers of 2 */
+enum {
         PROC_MIN_FILE_SIZE = 256,
-        PROC_MAX_FILE_SIZE = 16 * 1024,
+        PROC_MAX_FILE_SIZE = 64 * 1024, /* 16k was a bit too small for a 128-CPU machine */
 };
 
 typedef struct proc_file {
@@ -176,7 +176,10 @@ static void readfile_z(proc_file *pf, const char* fname)
         close(fd);
         if (rdsz > 0) {
                 if (rdsz == sz-1 && sz < PROC_MAX_FILE_SIZE) {
-                        sz *= 2;
+                        if (sz < 4 * 1024)
+                                sz *= 2;
+                        else
+                                sz += 4 * 1024;
                         buf = xrealloc(buf, sz);
                         goto again;
                 }