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view src/s/aix4.h @ 4499:eb82259f265d
Port write-region-inhibit-sync, allowing avoidance of bad FS performance.
See http://shaver.off.net/diary/2008/05/25/fsyncers-and-curveballs/ for more
details.
2008-08-09 Aidan Kehoe <kehoea@parhasard.net>
Integrate Romain Francoise' 2005-09-14 (pre-GPLV3) GNU change,
which can allow much better performace with some stupid
filesystems:
* fileio.c (write_region_inhibit_fsync): New variable.
(Fwrite_region): Use it to skip call to fsync.
(syms_of_fileio): Initialize it.
author | Aidan Kehoe <kehoea@parhasard.net> |
---|---|
date | Sat, 09 Aug 2008 16:44:46 +0200 |
parents | 943eaba38521 |
children |
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#define AIX4 #include "aix3-2-5.h" /* AIX 4 does not have HFT any more. */ #undef AIXHFT #ifndef NOT_C_CODE #define _XFUNCS_H_ 1 /* #### we don't use either any more. some AIX user should delete the include and see if anything breaks. --ben */ /* AIX is happier when bzero and strcasecmp are declared */ #include "strings.h" /* Forward declarations for xlc warning suppressions */ struct ether_addr; struct sockaddr_dl; #ifdef __xlC__ /* "eXceLlent C compiler" ?! */ #if __xlC__ >= 1200 /* IBM's C compiler option `-O3' is too aggressive. We recommend instead the combination `-O3 -qstrict', which seems safe. cc -O3 miscompiles at least two functions. From IBM's docs: IBM> -qstrict turns off the following optimizations: IBM> Performing code motion and scheduling on computations such as loads IBM> and floating-point computations that may trigger an exception. Nevertheless, we try to work with these compiler options. */ #pragma option_override (bytecount_to_charcount, "opt(strict,yes)") #pragma option_override (Fexpand_file_name, "opt(strict,yes)") #endif /* recent IBM C compiler */ #endif /* IBM's C compiler */ #endif /* C code */ /* getaddrinfo is broken in AIX 4.3 as per IY04165. At this time (2/21/2000), there's no PTF available. -- Mike Sperber <mike@xemacs.org> */ #undef HAVE_GETADDRINFO