meminfo: break apart a very long seq_printf with #ifdefs
Use a specific routine to emit most lines so that the code is easier to read and maintain. akpm: text data bss dec hex filename 2976 8 0 2984 ba8 fs/proc/meminfo.o before 2669 8 0 2677 a75 fs/proc/meminfo.o after Link: http://lkml.kernel.org/r/8fce7fdef2ba081a4ef531594e97da8a9feebb58.1470810406.git.joe@perches.com Signed-off-by: Joe Perches <joe@perches.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches
Linus Torvalds
Родитель
75ba1d07fd
Коммит
e16e2d8e14
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@ -23,6 +23,25 @@ void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
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{
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}
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static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
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{
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char v[32];
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static const char blanks[7] = {' ', ' ', ' ', ' ',' ', ' ', ' '};
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int len;
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len = num_to_str(v, sizeof(v), num << (PAGE_SHIFT - 10));
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seq_write(m, s, 16);
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if (len > 0) {
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if (len < 8)
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seq_write(m, blanks, 8 - len);
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seq_write(m, v, len);
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}
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seq_write(m, " kB\n", 4);
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}
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static int meminfo_proc_show(struct seq_file *m, void *v)
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{
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struct sysinfo i;
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@ -32,10 +51,6 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
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unsigned long pages[NR_LRU_LISTS];
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int lru;
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/*
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* display in kilobytes.
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*/
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#define K(x) ((x) << (PAGE_SHIFT - 10))
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si_meminfo(&i);
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si_swapinfo(&i);
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committed = percpu_counter_read_positive(&vm_committed_as);
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@ -50,136 +65,100 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
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available = si_mem_available();
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/*
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* Tagged format, for easy grepping and expansion.
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*/
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seq_printf(m,
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"MemTotal: %8lu kB\n"
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"MemFree: %8lu kB\n"
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"MemAvailable: %8lu kB\n"
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"Buffers: %8lu kB\n"
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"Cached: %8lu kB\n"
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"SwapCached: %8lu kB\n"
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"Active: %8lu kB\n"
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"Inactive: %8lu kB\n"
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"Active(anon): %8lu kB\n"
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"Inactive(anon): %8lu kB\n"
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"Active(file): %8lu kB\n"
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"Inactive(file): %8lu kB\n"
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"Unevictable: %8lu kB\n"
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"Mlocked: %8lu kB\n"
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show_val_kb(m, "MemTotal: ", i.totalram);
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show_val_kb(m, "MemFree: ", i.freeram);
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show_val_kb(m, "MemAvailable: ", available);
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show_val_kb(m, "Buffers: ", i.bufferram);
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show_val_kb(m, "Cached: ", cached);
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show_val_kb(m, "SwapCached: ", total_swapcache_pages());
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show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
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pages[LRU_ACTIVE_FILE]);
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show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
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pages[LRU_INACTIVE_FILE]);
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show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
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show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
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show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
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show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
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show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
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show_val_kb(m, "Mlocked: ", global_page_state(NR_MLOCK));
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#ifdef CONFIG_HIGHMEM
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"HighTotal: %8lu kB\n"
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"HighFree: %8lu kB\n"
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"LowTotal: %8lu kB\n"
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"LowFree: %8lu kB\n"
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show_val_kb(m, "HighTotal: ", i.totalhigh);
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show_val_kb(m, "HighFree: ", i.freehigh);
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show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
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show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
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#endif
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#ifndef CONFIG_MMU
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"MmapCopy: %8lu kB\n"
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show_val_kb(m, "MmapCopy: ",
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(unsigned long)atomic_long_read(&mmap_pages_allocated));
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#endif
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"SwapTotal: %8lu kB\n"
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"SwapFree: %8lu kB\n"
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"Dirty: %8lu kB\n"
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"Writeback: %8lu kB\n"
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"AnonPages: %8lu kB\n"
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"Mapped: %8lu kB\n"
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"Shmem: %8lu kB\n"
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"Slab: %8lu kB\n"
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"SReclaimable: %8lu kB\n"
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"SUnreclaim: %8lu kB\n"
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"KernelStack: %8lu kB\n"
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"PageTables: %8lu kB\n"
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show_val_kb(m, "SwapTotal: ", i.totalswap);
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show_val_kb(m, "SwapFree: ", i.freeswap);
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show_val_kb(m, "Dirty: ",
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global_node_page_state(NR_FILE_DIRTY));
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show_val_kb(m, "Writeback: ",
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global_node_page_state(NR_WRITEBACK));
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show_val_kb(m, "AnonPages: ",
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global_node_page_state(NR_ANON_MAPPED));
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show_val_kb(m, "Mapped: ",
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global_node_page_state(NR_FILE_MAPPED));
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show_val_kb(m, "Shmem: ", i.sharedram);
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show_val_kb(m, "Slab: ",
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global_page_state(NR_SLAB_RECLAIMABLE) +
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global_page_state(NR_SLAB_UNRECLAIMABLE));
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show_val_kb(m, "SReclaimable: ",
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global_page_state(NR_SLAB_RECLAIMABLE));
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show_val_kb(m, "SUnreclaim: ",
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global_page_state(NR_SLAB_UNRECLAIMABLE));
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seq_printf(m, "KernelStack: %8lu kB\n",
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global_page_state(NR_KERNEL_STACK_KB));
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show_val_kb(m, "PageTables: ",
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global_page_state(NR_PAGETABLE));
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#ifdef CONFIG_QUICKLIST
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"Quicklists: %8lu kB\n"
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show_val_kb(m, "Quicklists: ", quicklist_total_size());
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#endif
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"NFS_Unstable: %8lu kB\n"
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"Bounce: %8lu kB\n"
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"WritebackTmp: %8lu kB\n"
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"CommitLimit: %8lu kB\n"
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"Committed_AS: %8lu kB\n"
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"VmallocTotal: %8lu kB\n"
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"VmallocUsed: %8lu kB\n"
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"VmallocChunk: %8lu kB\n"
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show_val_kb(m, "NFS_Unstable: ",
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global_node_page_state(NR_UNSTABLE_NFS));
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show_val_kb(m, "Bounce: ",
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global_page_state(NR_BOUNCE));
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show_val_kb(m, "WritebackTmp: ",
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global_node_page_state(NR_WRITEBACK_TEMP));
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show_val_kb(m, "CommitLimit: ", vm_commit_limit());
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show_val_kb(m, "Committed_AS: ", committed);
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seq_printf(m, "VmallocTotal: %8lu kB\n",
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(unsigned long)VMALLOC_TOTAL >> 10);
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show_val_kb(m, "VmallocUsed: ", 0ul);
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show_val_kb(m, "VmallocChunk: ", 0ul);
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#ifdef CONFIG_MEMORY_FAILURE
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"HardwareCorrupted: %5lu kB\n"
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seq_printf(m, "HardwareCorrupted: %5lu kB\n",
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atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
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#endif
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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"AnonHugePages: %8lu kB\n"
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"ShmemHugePages: %8lu kB\n"
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"ShmemPmdMapped: %8lu kB\n"
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show_val_kb(m, "AnonHugePages: ",
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global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR);
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show_val_kb(m, "ShmemHugePages: ",
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global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR);
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show_val_kb(m, "ShmemPmdMapped: ",
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global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR);
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#endif
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#ifdef CONFIG_CMA
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"CmaTotal: %8lu kB\n"
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"CmaFree: %8lu kB\n"
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show_val_kb(m, "CmaTotal: ", totalcma_pages);
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show_val_kb(m, "CmaFree: ",
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global_page_state(NR_FREE_CMA_PAGES));
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#endif
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,
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K(i.totalram),
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K(i.freeram),
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K(available),
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K(i.bufferram),
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K(cached),
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K(total_swapcache_pages()),
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K(pages[LRU_ACTIVE_ANON] + pages[LRU_ACTIVE_FILE]),
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K(pages[LRU_INACTIVE_ANON] + pages[LRU_INACTIVE_FILE]),
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K(pages[LRU_ACTIVE_ANON]),
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K(pages[LRU_INACTIVE_ANON]),
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K(pages[LRU_ACTIVE_FILE]),
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K(pages[LRU_INACTIVE_FILE]),
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K(pages[LRU_UNEVICTABLE]),
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K(global_page_state(NR_MLOCK)),
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#ifdef CONFIG_HIGHMEM
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K(i.totalhigh),
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K(i.freehigh),
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K(i.totalram-i.totalhigh),
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K(i.freeram-i.freehigh),
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#endif
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#ifndef CONFIG_MMU
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K((unsigned long) atomic_long_read(&mmap_pages_allocated)),
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#endif
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K(i.totalswap),
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K(i.freeswap),
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K(global_node_page_state(NR_FILE_DIRTY)),
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K(global_node_page_state(NR_WRITEBACK)),
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K(global_node_page_state(NR_ANON_MAPPED)),
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K(global_node_page_state(NR_FILE_MAPPED)),
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K(i.sharedram),
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K(global_page_state(NR_SLAB_RECLAIMABLE) +
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global_page_state(NR_SLAB_UNRECLAIMABLE)),
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K(global_page_state(NR_SLAB_RECLAIMABLE)),
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K(global_page_state(NR_SLAB_UNRECLAIMABLE)),
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global_page_state(NR_KERNEL_STACK_KB),
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K(global_page_state(NR_PAGETABLE)),
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#ifdef CONFIG_QUICKLIST
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K(quicklist_total_size()),
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#endif
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K(global_node_page_state(NR_UNSTABLE_NFS)),
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K(global_page_state(NR_BOUNCE)),
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K(global_node_page_state(NR_WRITEBACK_TEMP)),
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K(vm_commit_limit()),
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K(committed),
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(unsigned long)VMALLOC_TOTAL >> 10,
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0ul, // used to be vmalloc 'used'
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0ul // used to be vmalloc 'largest_chunk'
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#ifdef CONFIG_MEMORY_FAILURE
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, atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
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#endif
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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, K(global_node_page_state(NR_ANON_THPS) * HPAGE_PMD_NR)
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, K(global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR)
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, K(global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR)
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#endif
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#ifdef CONFIG_CMA
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, K(totalcma_pages)
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, K(global_page_state(NR_FREE_CMA_PAGES))
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#endif
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);
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hugetlb_report_meminfo(m);
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arch_report_meminfo(m);
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return 0;
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#undef K
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}
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static int meminfo_proc_open(struct inode *inode, struct file *file)
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