* Who is 'Freeing init memory ...' @ 2013-08-15 8:08 Woody Wu 2013-08-15 8:41 ` Belisko Marek 0 siblings, 1 reply; 5+ messages in thread From: Woody Wu @ 2013-08-15 8:08 UTC (permalink / raw) To: kernelnewbies Hi, Near the end of kernel startup, there is a message 'Freeing init memory ..'. This process on embedded system takes several seconds. After searched kernel source, however, I cannot find the same literal text in all the .c files. So, I want to know, who was printing this message and how can I disable the behavior to save some boot time since I don't care losting of several hundreds kilo bytes of memory. Thanks in advance. woody -- I can't go back to yesterday - because I was a different person then ^ permalink raw reply [flat|nested] 5+ messages in thread
* Who is 'Freeing init memory ...' 2013-08-15 8:08 Who is 'Freeing init memory ...' Woody Wu @ 2013-08-15 8:41 ` Belisko Marek 2013-08-15 8:51 ` Woody Wu 0 siblings, 1 reply; 5+ messages in thread From: Belisko Marek @ 2013-08-15 8:41 UTC (permalink / raw) To: kernelnewbies Hi, On Thu, Aug 15, 2013 at 10:08 AM, Woody Wu <narkewoody@gmail.com> wrote: > Hi, > > Near the end of kernel startup, there is a message 'Freeing init memory > ..'. This process on embedded system takes several seconds. After > searched kernel source, however, I cannot find the same literal text in > all the .c files. rgrep 'Freeing' . on kernell source give me a lot of output. I believe you're looking on arm for that one: arch/arm/mm/init.c: printk(KERN_INFO "Freeing %s memory: %dK\n", s, size); So, I want to know, who was printing this message and > how can I disable the behavior to save some boot time since I don't care > losting of several hundreds kilo bytes of memory. > > Thanks in advance. > woody > > -- > I can't go back to yesterday - because I was a different person then > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies at kernelnewbies.org > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies Cheers, marek -- as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Freelance Developer Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite twitter: #opennandra web: http://open-nandra.com ^ permalink raw reply [flat|nested] 5+ messages in thread
* Who is 'Freeing init memory ...' 2013-08-15 8:41 ` Belisko Marek @ 2013-08-15 8:51 ` Woody Wu 2013-08-15 9:29 ` bill4carson 0 siblings, 1 reply; 5+ messages in thread From: Woody Wu @ 2013-08-15 8:51 UTC (permalink / raw) To: kernelnewbies On Thu, Aug 15, 2013 at 10:41:39AM +0200, Belisko Marek wrote: > Hi, > > On Thu, Aug 15, 2013 at 10:08 AM, Woody Wu <narkewoody@gmail.com> wrote: > > Hi, > > > > Near the end of kernel startup, there is a message 'Freeing init memory > > ..'. This process on embedded system takes several seconds. After > > searched kernel source, however, I cannot find the same literal text in > > all the .c files. > rgrep 'Freeing' . on kernell source give me a lot of output. I believe > you're looking on arm for that one: > arch/arm/mm/init.c: printk(KERN_INFO "Freeing %s memory: > %dK\n", s, size); Yes, thank you very much! Now I want to disable the 'Freeing' behavior to reduce boot time, is there a kernel config or cmdline option? I am not sure if I can disable CONFIG_HIGHMEM to archive this purpose. > So, I want to know, who was printing this message and > > how can I disable the behavior to save some boot time since I don't care > > losting of several hundreds kilo bytes of memory. > > > > Thanks in advance. > > woody > > > > -- > > I can't go back to yesterday - because I was a different person then > > > > _______________________________________________ > > Kernelnewbies mailing list > > Kernelnewbies at kernelnewbies.org > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > Cheers, > > marek > > -- > as simple and primitive as possible > ------------------------------------------------- > Marek Belisko - OPEN-NANDRA > Freelance Developer > > Ruska Nova Ves 219 | Presov, 08005 Slovak Republic > Tel: +421 915 052 184 > skype: marekwhite > twitter: #opennandra > web: http://open-nandra.com -- I can't go back to yesterday - because I was a different person then ^ permalink raw reply [flat|nested] 5+ messages in thread
* Who is 'Freeing init memory ...' 2013-08-15 8:51 ` Woody Wu @ 2013-08-15 9:29 ` bill4carson 2013-08-15 9:40 ` Woody Wu 0 siblings, 1 reply; 5+ messages in thread From: bill4carson @ 2013-08-15 9:29 UTC (permalink / raw) To: kernelnewbies On 2013?08?15? 16:51, Woody Wu wrote: > On Thu, Aug 15, 2013 at 10:41:39AM +0200, Belisko Marek wrote: >> Hi, >> >> On Thu, Aug 15, 2013 at 10:08 AM, Woody Wu<narkewoody@gmail.com> wrote: >>> Hi, >>> >>> Near the end of kernel startup, there is a message 'Freeing init memory >>> ..'. This process on embedded system takes several seconds. After >>> searched kernel source, however, I cannot find the same literal text in >>> all the .c files. >> rgrep 'Freeing' . on kernell source give me a lot of output. I believe >> you're looking on arm for that one: >> arch/arm/mm/init.c: printk(KERN_INFO "Freeing %s memory: >> %dK\n", s, size); > > Yes, thank you very much! Now I want to disable the 'Freeing' behavior > to reduce boot time, is there a kernel config or cmdline option? I am > not sure if I can disable CONFIG_HIGHMEM to archive this purpose. Why not bother to read the code? 712 void free_initmem(void) 713 { 714 #ifdef CONFIG_HAVE_TCM 715 extern char __tcm_start, __tcm_end; 716 717 totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)), 718 __phys_to_pfn(__pa(&__tcm_end)), 719 "TCM link"); 720 #endif 721 722 if (!machine_is_integrator() && !machine_is_cintegrator()) 723 totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)), 724 __phys_to_pfn(__pa(__init_end)), 725 "init"); 726 } 727 478 static inline int free_area(unsigned long pfn, unsigned long end, char *s) 479 { 480 unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10); 481 482 for (; pfn < end; pfn++) { 483 struct page *page = pfn_to_page(pfn); 484 ClearPageReserved(page); 485 init_page_count(page); 486 __free_page(page); 487 pages++; 488 } 489 490 if (size && s) 491 printk(KERN_INFO "Freeing %s memory: %dK\n", s, size); ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Does this really mean operations before the "Freeing init memory" cause the delay???? You want to bypass "Now I want to disable the 'Freeing' behavior", are you kidding? Please select printk timing the kernel hacking to find out where the delay actually lies. >> So, I want to know, who was printing this message and >>> how can I disable the behavior to save some boot time since I don't care >>> losting of several hundreds kilo bytes of memory. >>> >>> Thanks in advance. >>> woody >>> >>> -- >>> I can't go back to yesterday - because I was a different person then >>> >>> _______________________________________________ >>> Kernelnewbies mailing list >>> Kernelnewbies at kernelnewbies.org >>> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >> >> Cheers, >> >> marek >> >> -- >> as simple and primitive as possible >> ------------------------------------------------- >> Marek Belisko - OPEN-NANDRA >> Freelance Developer >> >> Ruska Nova Ves 219 | Presov, 08005 Slovak Republic >> Tel: +421 915 052 184 >> skype: marekwhite >> twitter: #opennandra >> web: http://open-nandra.com > -- ?????????,?????????? --bill ^ permalink raw reply [flat|nested] 5+ messages in thread
* Who is 'Freeing init memory ...' 2013-08-15 9:29 ` bill4carson @ 2013-08-15 9:40 ` Woody Wu 0 siblings, 0 replies; 5+ messages in thread From: Woody Wu @ 2013-08-15 9:40 UTC (permalink / raw) To: kernelnewbies On Thu, Aug 15, 2013 at 05:29:05PM +0800, bill4carson wrote: > > > On 2013?08?15? 16:51, Woody Wu wrote: > >On Thu, Aug 15, 2013 at 10:41:39AM +0200, Belisko Marek wrote: > >>Hi, > >> > >>On Thu, Aug 15, 2013 at 10:08 AM, Woody Wu<narkewoody@gmail.com> wrote: > >>>Hi, > >>> > >>>Near the end of kernel startup, there is a message 'Freeing init memory > >>>..'. This process on embedded system takes several seconds. After > >>>searched kernel source, however, I cannot find the same literal text in > >>>all the .c files. > >>rgrep 'Freeing' . on kernell source give me a lot of output. I believe > >>you're looking on arm for that one: > >>arch/arm/mm/init.c: printk(KERN_INFO "Freeing %s memory: > >>%dK\n", s, size); > > > >Yes, thank you very much! Now I want to disable the 'Freeing' behavior > >to reduce boot time, is there a kernel config or cmdline option? I am > >not sure if I can disable CONFIG_HIGHMEM to archive this purpose. > > > Why not bother to read the code? > > 712 void free_initmem(void) > 713 { > 714 #ifdef CONFIG_HAVE_TCM > 715 extern char __tcm_start, __tcm_end; > 716 > 717 totalram_pages += free_area(__phys_to_pfn(__pa(&__tcm_start)), > 718 __phys_to_pfn(__pa(&__tcm_end)), > 719 "TCM link"); > 720 #endif > 721 > 722 if (!machine_is_integrator() && !machine_is_cintegrator()) > 723 totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)), > 724 __phys_to_pfn(__pa(__init_end)), > 725 "init"); > 726 } > 727 > > > > 478 static inline int free_area(unsigned long pfn, unsigned long end, char *s) > 479 { > 480 unsigned int pages = 0, size = (end - pfn) << (PAGE_SHIFT - 10); > 481 > 482 for (; pfn < end; pfn++) { > 483 struct page *page = pfn_to_page(pfn); > 484 ClearPageReserved(page); > 485 init_page_count(page); > 486 __free_page(page); > 487 pages++; > 488 } > 489 > 490 if (size && s) > 491 printk(KERN_INFO "Freeing %s memory: %dK\n", s, size); > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > Does this really mean operations before the "Freeing init memory" cause the delay???? > You want to bypass "Now I want to disable the 'Freeing' behavior", are you kidding? > I also quickly go through the code, also found that the message was printed after the freeing job was done. At that moment I did not think too carefully, just wanted to disable the 'freeing' procedure then see what will happen. Yes, you are right, delay should caused by things afterwards. I will check that with printk timing. See you & thanks! > Please select printk timing the kernel hacking to find out where the delay actually lies. > > > > >>So, I want to know, who was printing this message and > >>>how can I disable the behavior to save some boot time since I don't care > >>>losting of several hundreds kilo bytes of memory. > >>> > >>>Thanks in advance. > >>>woody > >>> > >>>-- > >>>I can't go back to yesterday - because I was a different person then > >>> > >>>_______________________________________________ > >>>Kernelnewbies mailing list > >>>Kernelnewbies at kernelnewbies.org > >>>http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > >> > >>Cheers, > >> > >>marek > >> > >>-- > >>as simple and primitive as possible > >>------------------------------------------------- > >>Marek Belisko - OPEN-NANDRA > >>Freelance Developer > >> > >>Ruska Nova Ves 219 | Presov, 08005 Slovak Republic > >>Tel: +421 915 052 184 > >>skype: marekwhite > >>twitter: #opennandra > >>web: http://open-nandra.com > > > > -- > ?????????,?????????? > > --bill -- I can't go back to yesterday - because I was a different person then ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2013-08-15 9:40 UTC | newest] Thread overview: 5+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2013-08-15 8:08 Who is 'Freeing init memory ...' Woody Wu 2013-08-15 8:41 ` Belisko Marek 2013-08-15 8:51 ` Woody Wu 2013-08-15 9:29 ` bill4carson 2013-08-15 9:40 ` Woody Wu
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