diff --git a/SOURCES/kde-workspace-ksysguard-grow-buffer-size-as-needed.patch b/SOURCES/kde-workspace-ksysguard-grow-buffer-size-as-needed.patch
new file mode 100644
index 0000000..90fee37
--- /dev/null
+++ b/SOURCES/kde-workspace-ksysguard-grow-buffer-size-as-needed.patch
@@ -0,0 +1,50 @@
+diff --git a/ksysguard/ksysguardd/Linux/cpuinfo.c b/ksysguard/ksysguardd/Linux/cpuinfo.c
+index 9427ec0..6e37b68 100644
+--- a/ksysguard/ksysguardd/Linux/cpuinfo.c
++++ b/ksysguard/ksysguardd/Linux/cpuinfo.c
+@@ -40,8 +40,9 @@ static int numCores = 0; /* Total # of cores */
+ static int HighNumCores = 0; /* Highest # of cores ever seen */
+ static float* Clocks = 0; /* Array with one entry per core */
+ 
+-#define CPUINFOBUFSIZE (32 * 1024)
+-static char CpuInfoBuf[ CPUINFOBUFSIZE ];
++/* Enough for 4-6 virtual cores. Larger values will be tried as needed. */
++static size_t CpuInfoBufSize = 8 * 1024;
++static char* CpuInfoBuf = NULL;
+ static int Dirty = 0;
+ static struct SensorModul *CpuInfoSM;
+ 
+@@ -171,9 +172,12 @@ int updateCpuInfo( void )
+         return -1;
+     }
+ 
++    if ( CpuInfoBuf == NULL ) {
++        CpuInfoBuf = malloc( CpuInfoBufSize );
++    }
+     n = 0;
+     for(;;) {
+-        ssize_t len = read( fd, CpuInfoBuf + n, CPUINFOBUFSIZE - 1 - n );
++        ssize_t len = read( fd, CpuInfoBuf + n, CpuInfoBufSize - 1 - n );
+         if( len < 0 ) {
+             print_error( "Failed to read file \'/proc/cpuinfo\'!\n" );
+             CpuInfoOK = -1;
+@@ -183,11 +187,14 @@ int updateCpuInfo( void )
+         n += len;
+         if( len == 0 ) /* reading finished */
+             break;
+-        if( n == CPUINFOBUFSIZE - 1 ) {
+-            log_error( "Internal buffer too small to read \'/proc/cpuinfo\'" );
+-            CpuInfoOK = 0;
+-            close( fd );
+-            return -1;
++        if( n == CpuInfoBufSize - 1 ) {
++            /* The buffer was too small. Double its size and keep going. */
++            size_t new_size = CpuInfoBufSize * 2;
++            char* new_buffer = malloc( new_size );
++            memcpy( new_buffer, CpuInfoBuf, n ); /* copy read data */
++            free( CpuInfoBuf ); /* free old buffer */
++            CpuInfoBuf = new_buffer; /* remember new buffer and size */
++            CpuInfoBufSize = new_size;
+         }
+     }
+ 
diff --git a/SOURCES/kde-workspace-ksysguard-increase-cpu-buffer.patch b/SOURCES/kde-workspace-ksysguard-increase-cpu-buffer.patch
deleted file mode 100644
index 553853c..0000000
--- a/SOURCES/kde-workspace-ksysguard-increase-cpu-buffer.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/ksysguard/ksysguardd/Linux/cpuinfo.c b/ksysguard/ksysguardd/Linux/cpuinfo.c
-index 9427ec0..12786c5 100644
---- a/ksysguard/ksysguardd/Linux/cpuinfo.c
-+++ b/ksysguard/ksysguardd/Linux/cpuinfo.c
-@@ -40,7 +40,7 @@ static int numCores = 0; /* Total # of cores */
- static int HighNumCores = 0; /* Highest # of cores ever seen */
- static float* Clocks = 0; /* Array with one entry per core */
- 
--#define CPUINFOBUFSIZE (32 * 1024)
-+#define CPUINFOBUFSIZE (128 * 1024)
- static char CpuInfoBuf[ CPUINFOBUFSIZE ];
- static int Dirty = 0;
- static struct SensorModul *CpuInfoSM;
diff --git a/SPECS/kde-workspace.spec b/SPECS/kde-workspace.spec
index bb26be5..422da7e 100755
--- a/SPECS/kde-workspace.spec
+++ b/SPECS/kde-workspace.spec
@@ -22,7 +22,7 @@
 Summary: KDE Workspace
 Name:    kde-workspace
 Version: 4.11.19
-Release: 15%{?dist}
+Release: 16%{?dist}
 License: GPLv2
 URL:     https://projects.kde.org/projects/kde/kde-workspace
 Source0: http://download.kde.org/stable/applications/src/14.12.1/kde-workspace-%{version}.tar.xz
@@ -174,7 +174,7 @@ Patch70: kde-workspace-kscreenlocker-greeter-unlock-just-once.patch
 Patch71: kde-workspace-sanitise-notification-html.patch
 
 # Bug 1611762 - ksysguardd: "internal buffer too small to read /proc/cpuinfo" when running with many CPUs
-Patch72: kde-workspace-ksysguard-increase-cpu-buffer.patch
+Patch72: kde-workspace-ksysguard-grow-buffer-size-as-needed.patch
 
 # Bug 1677641 - Plastik theme shows defunct close button on non deletable gtk window
 Patch73: kde-workspace-plastik-do-not-show-disabled-buttons.patch
@@ -618,7 +618,7 @@ Conflicts: kde-workspace < 4.11.15-3
 %patch69 -p1 -b .taskmanager-grouping
 %patch70 -p1 -b .kscreenlocker-greeter-unlock-just-once
 %patch71 -p1 -b .sanitise-notification-html
-%patch72 -p1 -b .ksysguard-increase-cpu-buffer
+%patch72 -p1 -b .ksysguard-grow-buffer-size-as-needed
 %patch73 -p1 -b .plastik-do-not-show-disabled-buttons
 %patch74 -p1 -b .taskmanager-check-if-full-when-item-from-group-is-removed
 
@@ -1388,6 +1388,10 @@ fi
 %endif
 
 %changelog
+* Tue Jul 14 2020 Jan Grulich <jgrulich@redhat.com> - 4.11.19-16
+- KSysguard: Increase cpu buffer size in ksysguard
+  Resolves: bz#1856159
+
 * Wed Dec 04 2019 Jan Grulich <jgrulich@redhat.com> - 4.11.19-15
 - Fix curly bracket in the patch for Plastik decoration theme
   Resolves: bz#1779401