Feature #4015 » io.c-o_direct.patch
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/* do not change atime */
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rb_file_const("NOATIME", INT2FIX(O_NOATIME)); /* Linux */
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#endif
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#ifdef O_DIRECT
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/* Try to minimize cache effects of the I/O to and from this file. */
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rb_file_const("DIRECT", INT2FIX(O_DIRECT)); /* Linux */
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#endif
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sym_mode = ID2SYM(rb_intern("mode"));
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sym_perm = ID2SYM(rb_intern("perm"));
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