Remove unused zswap pool size calculation from commit 71f5a80d9e

Quick discussion with Ivan confirmed this was a left-over from
an earlier version of the zswap code and can be safely removed.

5 files changed, 0 insertions, 27 deletions

diff --git a/linux/LinuxMachine.c b/linux/LinuxMachine.c
index 34cd5d0b..aa1ff5f8 100644
--- a/linux/LinuxMachine.c
+++ b/linux/LinuxMachine.c
@@ -272,25 +272,6 @@ static void LinuxMachine_scanHugePages(LinuxMachine* this) {
    closedir(dir);
 }
 
-static inline void LinuxMachine_scanZswapInfo(LinuxMachine* this) {
-   const Machine* host = &this->super;
-   long max_pool_percent = 0;
-   char buf[256];
-   int r;
-
-   r = xReadfile("/sys/module/zswap/parameters/max_pool_percent", buf, 256);
-   if (r <= 0) {
-      return;
-   }
-   max_pool_percent = strtol(buf, NULL, 10);
-   if (max_pool_percent < 0 || max_pool_percent > 100) {
-      return;
-   }
-
-   this->zswap.totalZswapPool = host->totalMem * max_pool_percent / 100;
-   /* the rest of the metrics are set in LinuxMachine_scanMemoryInfo() */
-}
-
 static void LinuxMachine_scanZramInfo(LinuxMachine* this) {
    memory_t totalZram = 0;
    memory_t usedZramComp = 0;
@@ -641,7 +622,6 @@ void Machine_scan(Machine* super) {
    LinuxMachine_scanHugePages(this);
    LinuxMachine_scanZfsArcstats(this);
    LinuxMachine_scanZramInfo(this);
-   LinuxMachine_scanZswapInfo(this);
    LinuxMachine_scanCPUTime(this);
 
    const Settings* settings = super->settings;
diff --git a/linux/ZswapStats.h b/linux/ZswapStats.h
index 080f1e2a..29e516f4 100644
--- a/linux/ZswapStats.h
+++ b/linux/ZswapStats.h
@@ -10,8 +10,6 @@ in the source distribution for its full text.
 #include "ProcessTable.h"
 
 typedef struct ZswapStats_ {
-   /* maximum size of the zswap pool */
-   memory_t totalZswapPool;
    /* amount of RAM used by the zswap pool */
    memory_t usedZswapComp;
    /* amount of data stored inside the zswap pool */
diff --git a/pcp/Metric.h b/pcp/Metric.h
index 914d7d65..e72f6e19 100644
--- a/pcp/Metric.h
+++ b/pcp/Metric.h
@@ -93,7 +93,6 @@ typedef enum Metric_ {
    PCP_ZRAM_CAPACITY,           /* zram.capacity */
    PCP_ZRAM_ORIGINAL,           /* zram.mm_stat.data_size.original */
    PCP_ZRAM_COMPRESSED,         /* zram.mm_stat.data_size.compressed */
-   PCP_ZSWAP_MAX_POOL_PERCENT,  /* sysfs.module.zswap.max_pool_percent */
    PCP_MEM_ZSWAP,               /* mem.util.zswap */
    PCP_MEM_ZSWAPPED,            /* mem.util.zswapped */
    PCP_VFS_FILES_COUNT,         /* vfs.files.count */
diff --git a/pcp/PCPMachine.c b/pcp/PCPMachine.c
index faf3ae96..2e872534 100644
--- a/pcp/PCPMachine.c
+++ b/pcp/PCPMachine.c
@@ -179,12 +179,9 @@ static void PCPMachine_updatePerCPUReal(PCPMachine* this, Metric metric, CPUMetr
 }
 
 static inline void PCPMachine_scanZswapInfo(PCPMachine* this) {
-   const Machine* host = &this->super;
    pmAtomValue value;
 
    memset(&this->zswap, 0, sizeof(ZswapStats));
-   if (Metric_values(PCP_ZSWAP_MAX_POOL_PERCENT, &value, 1, PM_TYPE_U64))
-      this->zswap.totalZswapPool = host->totalMem * value.ull / 100;
    if (Metric_values(PCP_MEM_ZSWAP, &value, 1, PM_TYPE_U64))
       this->zswap.usedZswapComp = value.ull;
    if (Metric_values(PCP_MEM_ZSWAPPED, &value, 1, PM_TYPE_U64))
diff --git a/pcp/Platform.c b/pcp/Platform.c
index 402276ae..6fc2fc51 100644
--- a/pcp/Platform.c
+++ b/pcp/Platform.c
@@ -197,7 +197,6 @@ static const char* Platform_metricNames[] = {
    [PCP_ZRAM_CAPACITY] = "zram.capacity",
    [PCP_ZRAM_ORIGINAL] = "zram.mm_stat.data_size.original",
    [PCP_ZRAM_COMPRESSED] = "zram.mm_stat.data_size.compressed",
-   [PCP_ZSWAP_MAX_POOL_PERCENT] = "sysfs.module.zswap.max_pool_percent",
    [PCP_MEM_ZSWAP] = "mem.util.zswap",
    [PCP_MEM_ZSWAPPED] = "mem.util.zswapped",
    [PCP_VFS_FILES_COUNT] = "vfs.files.count",