Maximum core file size in Linux

Appears that there's an implicit 2Gb limit on the size of core files because it's being created without O_LARGEFILE.

A small change in fs/exec.c (do_coredump) gets me past the limit and I can now generate a core file in excess of 2Gb but then gdb complains that the core dump is too large ...

Looks like there's a broader underlying issue here that would involve changes to other places than I had thought would be required.

Anyone else out there run into a similar problem ? And if so, could you let me know what other things I may run into ... Also, is this something that has been fixed in a forthcoming release ?

Thanks,

/a

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Amrith Kumar
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This is likely a gdb issue. Unless you're carefull to use 64 bit functions of *seek*() and ftell(), your only able to access the first 2GB of a file. gdb may have issues here.

I don't recall the elf header but you may want to check the 32 bit elf format and see if is even capable to be used with core file that exceed 2GB. Said in anothre way there *could* be elf-header offsets that is 32 bit and try pointing beyond 2GB.

Terje

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Terje Eggestad                  mailto:[email protected]
Scali Scalable Linux Systems    http://www.scali.com

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