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youhey id:youhey

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CentOS5ã§ã‚‚RPS/RFSã§NICãŒæ—ã‚‹è©± | Nekoya press
kazeburoã•ã‚“ãŒCentOS6.2ã§ã®äº‹ä¾‹ã‚’ç´¹ä»‹ã•ã‚Œã¦ã„ã¾ã™ãŒã€CentOS5ç³»ã§ã‚‚kernelã‚’ä¸Šã’ã‚Œã°RPS/RFSãŒä½¿ãˆã‚‹ã‚ˆã†ã«ãªã£ã¦ã€NICã®è² è·çŠ¶æ³ãŒåŠ‡çš„ã«æ”¹å–„ã—ã¾ã™ã€‚ ã‚„ã‚Šæ–¹ã¯æ„å¤–ã«ç°¡å˜ã§ã€ELRepoã‹ã‚‰kernel-ml-2.6.35-14.2.el5.elrepo.x86_64.rpmã‚’è½ã¨ã—ã¦ãã¦ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã€‚ ã‚ã¨ã¯ã€/boot/grub/menu.lstã®è¨å®šã‚’default=0ã«ã—ã¦rebootã™ã‚Œã°OKã€‚ $ uname -r 2.6.35-14.2.el5.elrepo ELRepoã¯NICã®ãƒ‰ãƒ©ã‚¤ãƒãªã‚“ã‹ã‚‚ã„ã‚ã„ã‚æä¾›ã—ã¦ãã‚Œã‚‹ã—ã€å¤ã„ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã®RPMã‚’archiveã§æä¾›ã—ã¦ãã‚Œã¦éžå¸¸ã«ã„ã„ã§ã™ãï¼ˆkernelã®éŽåŽ»RPMã¯ãªã„ã®ã‹ãªï¼‰ã€‚ RPS/RFSã‚’æœ‰åŠ¹ã«ã™ã‚‹è¨å®šã¯CentOS6ã¨åŒæ§˜ã§ã™ã€‚ # echo "f" > /sys/class/n
youhey 2012/11/16
CentOS

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Linux Daily Topics 2010å¹´11æœˆ18æ—¥"ãƒŸãƒ©ã‚¯ãƒ«ãƒ‘ãƒƒãƒ"ã«Linusã‚‚å¤§å–œã³ï¼Linuxã‚«ãƒ¼ãƒãƒ«ã‚’é«˜é€ŸåŒ–ã•ã›ãŸ233è¡Œã®ã‚³ãƒ¼ãƒ‰ Linus Torvaldsæ°ã¨ã„ã†äººã¯ã€å°‘ãªãã¨ã‚‚ãƒ¡ãƒ¼ãƒ«ã®ä¸ã§ã¯ã€ã‹ãªã‚Šã¯ã£ãã‚Šã¨æ„Ÿæƒ…ã‚’è¡¨ã«å‡ºã™ã€‚èª°ã‹orä½•ã‹ã«å¯¾ã—ã¦æ€’ã£ã¦ã„ã‚‹ã¨ãã¯ç›¸æ‰‹ã‚’åæŒ‡ã—ã§æ‰¹åˆ¤ï¼ˆã¨ã„ã†ã‚ˆã‚Šéžé›£ï¼‰ã—ã€é€†ã«ã†ã‚Œã—ã„ã¨ãã¯ã‚ãµã‚Œã‚‹å–œã³ã‚’éš ãã†ã¨ã—ãªã„ã€‚ä»Šå›žç´¹ä»‹ã™ã‚‹ã®ã¯å¾Œè€…ã®ã»ã†ã€‚ã€Œâ I'm also very happyã€ã€Œâ it is a _huge_ improvementã€ã€Œâ Good job.ã€ãªã©ã€å–œã³ã¨ç§°è³›ã®è¡¨ç¾ãŒãŸãã•ã‚“æ›¸ã‹ã‚Œã¦ã„ã‚‹ãƒ¡ãƒ¼ãƒ«ã ã€‚ Linusæ°ã‚’æ“å–œã•ã›ãŸã®ã¯ã€ã‚«ãƒ¼ãƒãƒ«é–‹ç™ºã«æºã‚ã‚‹Mike Galbraithæ°ãŒæ›¸ã„ãŸ233è¡Œã®ã‚«ãƒ¼ãƒãƒ«ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒªãƒ³ã‚°ãƒ‘ãƒƒãƒã€‚ã“ã®ãƒ‘ãƒƒãƒã‚’é©ç”¨ã™ã‚‹ã¨ã€ãƒ‡ã‚¹ã‚¯ãƒˆãƒƒãƒ—ç’°å¢ƒã«ãŠã„ã¦ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ãŒè‘—ã—ãå‘ä¸Šã™ã‚‹ã¨ã„ã†ã€‚
youhey 2010/11/22
Linux

programming

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youhey 2009/09/07
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youhey 2008/11/28
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youhey 2008/10/02
Linux

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Exploring some Linux 2.3.x new feature: HIGHMEM
youhey 2008/09/25
HightMem

Linux

kernel
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ã‚«ãƒ¼ãƒãƒ«ç©ºé–“ã®ãƒ¡ãƒ¢ãƒªãƒžãƒƒãƒ— - Linuxã‚«ãƒ¼ãƒãƒ«ãƒ¡ãƒ¢
ã‚«ãƒ¼ãƒãƒ«ç©ºé–“ã®PageDirectoryã“ã®ã‚¹ãƒˆãƒ¬ãƒ¼ãƒˆãƒžãƒƒãƒ—ã—ã¦ã„ã‚‹PageDirectoryã¯swapper_pg_dirã«æ ¼ç´ã•ã‚Œã¦ã„ã‚‹ã€‚ç«‹ã¡ä¸Šã’æ™‚ã«åˆæœŸåŒ–ã•ã‚Œã‚‹ã€‚ arch/i386/mm/init.c paging_init() pagetable_init() : kernel_physical_mapping_init(swapper_pg_dir) ã‚«ãƒ¼ãƒãƒ«ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“(0xc0000000ã€œ)ã‚’ç‰©ç†ãƒ¡ãƒ¢ãƒªã¸ã‚¹ãƒˆãƒ¬ãƒ¼ãƒˆãƒžãƒƒãƒ— (max_low_pfnãƒšãƒ¼ã‚¸åˆ†ã‚’ãƒžãƒƒãƒ—) <--å…¨ç‰©ç†ãƒšãƒ¼ã‚¸åˆ† swapper_pg_dirã®å…ˆã«PageDirectoryãŒä½œæˆã•ã‚Œã‚‹ã€‚ swapper_pg_dirã‚’CR3ã«è¨å®šã—ã¦ã‚¹ãƒˆãƒ¬ãƒ¼ãƒˆãƒžãƒƒãƒ—å®Œäº† å„ãƒ—ãƒã‚»ã‚¹PageDirectoryã¸ã®ã‚³ãƒ”ãƒ¼å„ãƒ—ãƒã‚»ã‚¹ã®PageDirectoryã«ã‚‚ã‚«ãƒ¼ãƒãƒ«ç©ºé–“(0xc0000000-)ã®ãƒžãƒƒãƒ—ãŒå…¥ã£ã¦ã„ã¦
youhey 2008/09/25
ãƒ¡ãƒ¢ãƒªãƒžãƒƒãƒ—

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HighMemory - kmap Linuxã‚«ãƒ¼ãƒãƒ«ãƒ¡ãƒ¢
0xc0000000ä»¥é™ã®ç´„1GBã®ã‚«ãƒ¼ãƒãƒ«ç©ºé–“ã¯ç‰©ç†ãƒšãƒ¼ã‚¸ã«å¯¾ã—ã¦ã‚¹ãƒˆãƒ¬ãƒ¼ãƒˆã«ãƒžãƒƒãƒ—ã•ã‚Œã‚‹(å›³1)ã€‚ã‚«ãƒ¼ãƒãƒ«ã®ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“ã¯1GBã¾ã§ã—ã‹ãªã„ãŸã‚ã€ç‰©ç†ãƒ¡ãƒ¢ãƒªã‚’1GBä»¥ä¸Šå®Ÿè£…ã™ã‚‹ã¨ã‚¹ãƒˆãƒ¬ãƒ¼ãƒˆã«ãƒžãƒƒãƒ—ã§ããªã„ãƒ¡ãƒ¢ãƒªãŒã§ãã‚‹ã€‚ã“ã®ã‚¹ãƒˆãƒ¬ãƒ¼ãƒˆãƒžãƒƒãƒ—ã•ã‚Œãªã„é«˜ä½ã®ãƒ¡ãƒ¢ãƒªã‚’HighMemoryã¨å‘¼ã¶ã€‚æ£ç¢ºã«ã¯896MBä»¥é™ãŒHighMemoryã¨ãªã‚‹ã€‚é€†ã«ã‚¹ãƒˆãƒ¬ãƒ¼ãƒˆãƒžãƒƒãƒ—ã•ã‚Œã¦ã„ã‚‹ãƒ¡ãƒ¢ãƒªLowMemoryã¨å‘¼ã°ã‚Œã‚‹ã€‚ ã‚«ãƒ¼ãƒãƒ«ã®ä½¿ç”¨ã™ã‚‹å¤šãã®ãƒ‡ãƒ¼ã‚¿ã¯åŸºæœ¬çš„ã«ã‚¹ãƒˆãƒ¬ãƒ¼ãƒˆãƒžãƒƒãƒ—ã•ã‚Œã¦ã„ã‚‹LowMemã«ç½®ã‹ãªã„ã¨ã„ã‘ãªã„ã‚‚ã®ãŒå¤šã„ãŸã‚(*1)(*2)ã€å¤§è¦æ¨¡ãªã‚·ã‚¹ãƒ†ãƒ ã ã¨ã‚«ãƒ¼ãƒãƒ«ãƒ‡ãƒ¼ã‚¿ãŒå¤§ãããªã‚Šã€LowMemoryã®ã‚µã‚¤ã‚ºãŒãƒãƒƒã‚¯ã«ãªã£ã¦ãã‚‹ã€‚ã“ã®ãŸã‚ã€ãƒ—ãƒã‚»ã‚¹ã®ãƒ¦ãƒ¼ã‚¶ç©ºé–“ã¸ã®ãƒšãƒ¼ã‚¸ã®å‰²ã‚Šå½“ã¦ãªã©ã¯HighMemoryã‹ã‚‰å„ªå…ˆçš„ã«å‰²ã‚Šå½“ã¦ã‚‹ã‚ˆã†ã—ã¦ã€LowMemoryã‚’åœ§è¿«ã—ãªã„ã‚ˆã†ã«ã—ã¦ã„ã‚‹ã€‚ (*
youhey 2008/09/25
HightMemory

Linux

kernel
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ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“ - Linuxã‚«ãƒ¼ãƒãƒ«ãƒ¡ãƒ¢
ãƒ¡ãƒ¢ãƒªãƒžãƒƒãƒ— ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“ +-------------+ 0x00000000 (3GB) | Processç©ºé–“ | | ãƒ—ãƒã‚»ã‚¹æ¯Ž | | | | | | | | | | | | | | | | | | | +-------------+ | Kernelç©ºé–“ | 0xc0000000 (high_memoryã¾ã§896MB) | | ç‰©ç†ãƒšãƒ¼ã‚¸0ä»¥é™ã¸é †ç•ªã«ã‚¹ãƒˆãƒ¬ãƒ¼ãƒˆãƒžãƒƒãƒ—ã•ã‚Œã‚‹(LowMem) | | 896MBä»¥é™ã®ç‰©ç†ãƒ¡ãƒ¢ãƒªã¯HighMemã€‚ | | | | | | +-------------+ high_memory (0xf8000000) <== __va(highstart_pfn * PAGE_SIZE) | 8MB hole | ã‚ªãƒ¼ãƒãƒ©ãƒ³æ¤œå‡ºç”¨ +-------------+ VMALLOC_START (ç´„112MB) | vmallocç”¨ | | | +-
youhey 2008/09/25
ã‚¢ãƒ‰ãƒ¬ã‚¹ç©ºé–“

Linux

kernel
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