Date: Mon, 31 Oct 2011 22:21:57 +0100 From: Ed Schouten <ed@80386.nl> To: John Baldwin <jhb@freebsd.org> Cc: arch@freebsd.org, Jilles Tjoelker <jilles@stack.nl> Subject: Re: [PATCH] fadvise(2) system call Message-ID: <20111031212157.GQ2258@hoeg.nl> In-Reply-To: <201110311717.53476.jhb@freebsd.org> References: <201110281426.00013.jhb@freebsd.org> <201110311024.07580.jhb@freebsd.org> <20111031190359.GP2258@hoeg.nl> <201110311717.53476.jhb@freebsd.org>
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--wg9FEZT+WCTrEXgJ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * John Baldwin <jhb@freebsd.org>, 20111031 22:17: > They don't. They use fadvise() which is part of Linux's API much as=20 > madvise(2) is part of ours. (See the other fork in this thread.) Huh? Wait. It seems fadvise() is only a name used by the Linux kernel. It's not exported by glibc as a symbol. At least not on my laptop (Ubuntu 11.10). > (ed@mekker) ~ $ man fadvise > No manual entry for fadvise > (ed@mekker) ~ $ fgrep -r fadvise /usr/include | grep -v posix_fadvise > /usr/include/x86_64-linux-gnu/bits/syscall.h:#define SYS_fadvise64 __NR_f= advise64 > /usr/include/x86_64-linux-gnu/bits/syscall.h:#define SYS_fadvise64_64 __N= R_fadvise64_64 > /usr/include/x86_64-linux-gnu/asm/unistd_64.h:#define __NR_fadvise64 2= 21 > /usr/include/x86_64-linux-gnu/asm/unistd_64.h:__SYSCALL(__NR_fadvise64, s= ys_fadvise64) > /usr/include/x86_64-linux-gnu/asm/unistd_32.h:#define __NR_fadvise64 250 > /usr/include/x86_64-linux-gnu/asm/unistd_32.h:#define __NR_fadvise64_64 2= 72 > /usr/include/asm-generic/unistd.h:/* mm/fadvise.c */ > /usr/include/asm-generic/unistd.h:#define __NR3264_fadvise64 223 > /usr/include/asm-generic/unistd.h:__SC_COMP(__NR3264_fadvise64, sys_fadvi= se64_64, compat_sys_fadvise64_64) > /usr/include/asm-generic/unistd.h:#define __NR_fadvise64 1053 > /usr/include/asm-generic/unistd.h:__SYSCALL(__NR_fadvise64, sys_fadvise64) > /usr/include/asm-generic/unistd.h:#define __NR_fadvise64 __NR3264_fadvise= 64 > /usr/include/asm-generic/unistd.h:#define __NR_fadvise64_64 __NR3264_fadv= ise64 > (ed@mekker) ~ $ nm -D /lib/x86_64-linux-gnu/libc.so.6 | grep fadvise > 00000000000d59e0 T posix_fadvise > 00000000000d59e0 T posix_fadvise64 --=20 Ed Schouten <ed@80386.nl> WWW: http://80386.nl/ --wg9FEZT+WCTrEXgJ Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iQIcBAEBAgAGBQJOrxF1AAoJEG5e2P40kaK7jUQP/3MgNDOIy9KT19oHXut9JKRX yMvC9BKPmHZJ/5V4vF+3hTZDqyCjSvU79y8Z0yeVlRygyYjuQxBhtPlZFsVybXUL rxMgDrbMYUhgqkSrV0jWpK00h1x3B9ei8IHkZOwsUzxKT/mT6kQYJLJ3tebJwk/2 ZdtrODs/YmZ2cqmU0m+2dDCcOa5B2wWkiYZohcIB6QOp2G7Wz/2fCXHEE9JLVMJT BibPib6Qv7MQG0pBTu99fYs4O1wizMFfLuh7Q0agyECvcf0Q7U0KLwDDbzZqh+dX bR3IKjVTRLZPhYDhOQHzVMXByXKP52IYlj1QSHEtiDr5t7Al/r9OX0ynqIcJVY1s PL4SePUDXDoLxRTwfSZSWykQFDjZBzRwLXM9sV+DyP0bccZmeMwLNtR8BhJ7dT5p zA/kYyHzeXPoJCbimTsfG6taMSaHCUWvi1Ob5hytSlOOc7vSFzzDzjGxRPtzusc+ qv6OJAZM692OML8GbLYNhJY9NO69vyL3E/P4sJblNstESYd3AY+GfeJXO5Wh6YAV z9ATBEN5817hjDglWj/hEywAi9y4/g48YA1L7csMk0T5tqvVA9jFwBS+ZU6aQWVM JRMQjSaEY3QGH6fTrlzmBV59F8rhaB/BIU9/U5pyWqWPdJ5TG3ppvEErSZc2ux4A sd+RCKsJ7jC7Nn+5FsGf =nl0q -----END PGP SIGNATURE----- --wg9FEZT+WCTrEXgJ--
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