Messages in this thread | | | Date | Fri, 16 May 2008 06:44:00 +0200 | From | Eric Dumazet <> | Subject | Re: [PATCH] modules: Use a better scheme for refcounting |
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Andi Kleen a écrit : > Eric Dumazet <dada1@cosmosbay.com> writes: > >> Instead of wasting NR_CPUS*128 bytes (on i386), we now use >> num_possible_cpus*sizeof(local_t) bytes. >> >> On a typical distro, where NR_CPUS=8, >> > > More typical would be NR_CPUS=128, with NR_CPUS=four digits > when Mike Travis et.al. are finished > > Yes. With NR_CPUS=4096, we save about half a megabyte per module. (!!!)
>> shiping 2000 modules, we reduce >> > > Surely only the loaded modules count? Perhaps 20-30. > > Well, I should have stated that this saving also takes place in the module disk file. (The "struct module" is included in it, in the ".gnu.linkonce.this_module" section) Here on my distro, around 2000 modules are shiped. > But it's a cool improvement. Very nice. > Thanks
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