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Date: Fri, 19 Aug 2016 12:12:59 +0200
From: Michal Hocko <mhocko@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Joe Perches <joe@...ches.com>, Jann Horn <jann@...jh.net>,
<linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
Michal Hocko <mhocko@...e.com>
Subject: [PATCH 1/2] proc, meminfo: abstract show_val_kb
From: Michal Hocko <mhocko@...e.com>
show_val_kb is currently tight meminfo usage but we would like to reuse
it for other proc files. Let's pull it out to proc internal header,
rename to show_name_pages_kb to be explicit that it operates on page
units and change show_val_kb to only print the value.
Signed-off-by: Michal Hocko <mhocko@...e.com>
---
fs/proc/internal.h | 10 ++++++
fs/proc/meminfo.c | 93 ++++++++++++++++++++++++++----------------------------
2 files changed, 55 insertions(+), 48 deletions(-)
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 7931c558c192..10492701f4c1 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -304,3 +304,13 @@ extern unsigned long task_statm(struct mm_struct *,
unsigned long *, unsigned long *,
unsigned long *, unsigned long *);
extern void task_mem(struct seq_file *, struct mm_struct *);
+
+/* prints given value (in kB) padded properly to 8 spaces */
+extern void show_val_kb(struct seq_file *m, unsigned long num);
+
+#define show_name_pages_kb(seq, name, pages) \
+({ \
+ BUILD_BUG_ON(!__builtin_constant_p(name));\
+ seq_write(seq, name, sizeof(name)); \
+ show_val_kb(seq, (pages) << (PAGE_SHIFT - 10));\
+ })
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 8a428498d6b2..65e0bc6213e2 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -23,16 +23,13 @@ void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
{
}
-static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
+void show_val_kb(struct seq_file *m, unsigned long num)
{
char v[32];
static const char blanks[7] = {' ', ' ', ' ', ' ',' ', ' ', ' '};
int len;
- len = num_to_str(v, sizeof(v), num << (PAGE_SHIFT - 10));
-
- seq_write(m, s, 16);
-
+ len = num_to_str(v, sizeof(v), num);
if (len > 0) {
if (len < 8)
seq_write(m, blanks, 8 - len);
@@ -65,74 +62,74 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
available = si_mem_available();
- show_val_kb(m, "MemTotal: ", i.totalram);
- show_val_kb(m, "MemFree: ", i.freeram);
- show_val_kb(m, "MemAvailable: ", available);
- show_val_kb(m, "Buffers: ", i.bufferram);
- show_val_kb(m, "Cached: ", cached);
- show_val_kb(m, "SwapCached: ", total_swapcache_pages());
- show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
+ show_name_pages_kb(m, "MemTotal: ", i.totalram);
+ show_name_pages_kb(m, "MemFree: ", i.freeram);
+ show_name_pages_kb(m, "MemAvailable: ", available);
+ show_name_pages_kb(m, "Buffers: ", i.bufferram);
+ show_name_pages_kb(m, "Cached: ", cached);
+ show_name_pages_kb(m, "SwapCached: ", total_swapcache_pages());
+ show_name_pages_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
pages[LRU_ACTIVE_FILE]);
- show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
+ show_name_pages_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
pages[LRU_INACTIVE_FILE]);
- show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
- show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
- show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
- show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
- show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
- show_val_kb(m, "Mlocked: ", global_page_state(NR_MLOCK));
+ show_name_pages_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
+ show_name_pages_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
+ show_name_pages_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
+ show_name_pages_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
+ show_name_pages_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
+ show_name_pages_kb(m, "Mlocked: ", global_page_state(NR_MLOCK));
#ifdef CONFIG_HIGHMEM
- show_val_kb(m, "HighTotal: ", i.totalhigh);
- show_val_kb(m, "HighFree: ", i.freehigh);
- show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
- show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
+ show_name_pages_kb(m, "HighTotal: ", i.totalhigh);
+ show_name_pages_kb(m, "HighFree: ", i.freehigh);
+ show_name_pages_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
+ show_name_pages_kb(m, "LowFree: ", i.freeram - i.freehigh);
#endif
#ifndef CONFIG_MMU
- show_val_kb(m, "MmapCopy: ",
+ show_name_pages_kb(m, "MmapCopy: ",
(unsigned long)atomic_long_read(&mmap_pages_allocated));
#endif
- show_val_kb(m, "SwapTotal: ", i.totalswap);
- show_val_kb(m, "SwapFree: ", i.freeswap);
- show_val_kb(m, "Dirty: ",
+ show_name_pages_kb(m, "SwapTotal: ", i.totalswap);
+ show_name_pages_kb(m, "SwapFree: ", i.freeswap);
+ show_name_pages_kb(m, "Dirty: ",
global_node_page_state(NR_FILE_DIRTY));
- show_val_kb(m, "Writeback: ",
+ show_name_pages_kb(m, "Writeback: ",
global_node_page_state(NR_WRITEBACK));
- show_val_kb(m, "AnonPages: ",
+ show_name_pages_kb(m, "AnonPages: ",
global_node_page_state(NR_ANON_MAPPED));
- show_val_kb(m, "Mapped: ",
+ show_name_pages_kb(m, "Mapped: ",
global_node_page_state(NR_FILE_MAPPED));
- show_val_kb(m, "Shmem: ", i.sharedram);
- show_val_kb(m, "Slab: ",
+ show_name_pages_kb(m, "Shmem: ", i.sharedram);
+ show_name_pages_kb(m, "Slab: ",
global_page_state(NR_SLAB_RECLAIMABLE) +
global_page_state(NR_SLAB_UNRECLAIMABLE));
- show_val_kb(m, "SReclaimable: ",
+ show_name_pages_kb(m, "SReclaimable: ",
global_page_state(NR_SLAB_RECLAIMABLE));
- show_val_kb(m, "SUnreclaim: ",
+ show_name_pages_kb(m, "SUnreclaim: ",
global_page_state(NR_SLAB_UNRECLAIMABLE));
seq_printf(m, "KernelStack: %8lu kB\n",
global_page_state(NR_KERNEL_STACK_KB));
- show_val_kb(m, "PageTables: ",
+ show_name_pages_kb(m, "PageTables: ",
global_page_state(NR_PAGETABLE));
#ifdef CONFIG_QUICKLIST
- show_val_kb(m, "Quicklists: ", quicklist_total_size());
+ show_name_pages_kb(m, "Quicklists: ", quicklist_total_size());
#endif
- show_val_kb(m, "NFS_Unstable: ",
+ show_name_pages_kb(m, "NFS_Unstable: ",
global_node_page_state(NR_UNSTABLE_NFS));
- show_val_kb(m, "Bounce: ",
+ show_name_pages_kb(m, "Bounce: ",
global_page_state(NR_BOUNCE));
- show_val_kb(m, "WritebackTmp: ",
+ show_name_pages_kb(m, "WritebackTmp: ",
global_node_page_state(NR_WRITEBACK_TEMP));
- show_val_kb(m, "CommitLimit: ", vm_commit_limit());
- show_val_kb(m, "Committed_AS: ", committed);
+ show_name_pages_kb(m, "CommitLimit: ", vm_commit_limit());
+ show_name_pages_kb(m, "Committed_AS: ", committed);
seq_printf(m, "VmallocTotal: %8lu kB\n",
(unsigned long)VMALLOC_TOTAL >> 10);
- show_val_kb(m, "VmallocUsed: ", 0ul);
- show_val_kb(m, "VmallocChunk: ", 0ul);
+ show_name_pages_kb(m, "VmallocUsed: ", 0ul);
+ show_name_pages_kb(m, "VmallocChunk: ", 0ul);
#ifdef CONFIG_MEMORY_FAILURE
seq_printf(m, "HardwareCorrupted: %5lu kB\n",
@@ -140,17 +137,17 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
#endif
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- show_val_kb(m, "AnonHugePages: ",
+ show_name_pages_kb(m, "AnonHugePages: ",
global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR);
- show_val_kb(m, "ShmemHugePages: ",
+ show_name_pages_kb(m, "ShmemHugePages: ",
global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR);
- show_val_kb(m, "ShmemPmdMapped: ",
+ show_name_pages_kb(m, "ShmemPmdMapped: ",
global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR);
#endif
#ifdef CONFIG_CMA
- show_val_kb(m, "CmaTotal: ", totalcma_pages);
- show_val_kb(m, "CmaFree: ",
+ show_name_pages_kb(m, "CmaTotal: ", totalcma_pages);
+ show_name_pages_kb(m, "CmaFree: ",
global_page_state(NR_FREE_CMA_PAGES));
#endif
--
2.8.1
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