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9c20dc9963
freebsd-dev/lib/libc
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John Baldwin 9c20dc9963 Add more documentation regarding unsafe AIO requests. 
The asynchronous I/O changes made previously result in different
behavior out of the box. Previously all AIO requests failed with
ENOSYS / SIGSYS unless aio.ko was explicitly loaded. Now, some AIO
requests complete and others ("unsafe" requests) fail with EOPNOTSUPP.

Reword the introductory paragraph in aio(4) to add a general
description of AIO before describing the vfs.aio.enable_unsafe sysctl.

Remove the ENOSYS error description from aio_fsync(2), aio_read(2),
and aio_write(2) and replace it with a description of EOPNOTSUPP.

Remove the ENOSYS error description from aio_mlock(2).

Log a message to the system log the first time a process requests an
"unsafe" AIO request that fails with EOPNOTSUPP. This is modeled on
the log message used for processes using the legacy pty devices.

Reviewed by:	kib (earlier version)
MFC after:	1 week
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D7151
2016-07-21 22:49:47 +00:00
..
aarch64 Replace use of the pipe(2) system call with pipe2(2) with a zero flags 2016-06-22 21:11:27 +00:00
amd64 Replace use of the pipe(2) system call with pipe2(2) with a zero flags 2016-06-22 21:11:27 +00:00
arm Replace use of the pipe(2) system call with pipe2(2) with a zero flags 2016-06-22 21:11:27 +00:00
capability
compat-43
db Fix prototype of dbm_open(). 2016-05-31 18:32:57 +00:00
gdtoa
gen 1) GLOB_BRACE was somewhat broken. First it repeatedly calls glob0() in 2016-07-21 12:53:36 +00:00
gmon
i386 Replace use of the pipe(2) system call with pipe2(2) with a zero flags 2016-06-22 21:11:27 +00:00
iconv citrus: Remove redundant code in _citrus_esdb_get_list(). 2016-06-02 17:28:39 +00:00
include Add implementation of robust mutexes, hopefully close enough to the 2016-05-17 09:56:22 +00:00
inet libc: do not include <sys/types.h> where <sys/param.h> was already included 2016-04-18 21:05:15 +00:00
isc libc: do not include <sys/types.h> where <sys/param.h> was already included 2016-04-18 21:05:15 +00:00
locale libc: tag the Rune initialization function prototypes visibility as hidden. 2016-07-19 20:22:13 +00:00
md
mips Replace use of the pipe(2) system call with pipe2(2) with a zero flags 2016-06-22 21:11:27 +00:00
nameser libc: spelling fixes. 2016-04-30 01:24:24 +00:00
net Revert r301707 2016-06-08 23:30:13 +00:00
nls Move logic to destroy a struct catentry to its own function. 2016-02-02 23:33:58 +00:00
posix1e libc: spelling fixes. 2016-04-30 01:24:24 +00:00
powerpc Replace use of the pipe(2) system call with pipe2(2) with a zero flags 2016-06-22 21:11:27 +00:00
powerpc64 Replace use of the pipe(2) system call with pipe2(2) with a zero flags 2016-06-22 21:11:27 +00:00
quad
regex 1) Eliminate possibility to call __*collate_range_cmp() with inclomplete 2016-07-14 09:07:25 +00:00
resolv Don't leak addrinfo if ai->ai_addrlen <= minsiz test fails. 2016-06-08 09:40:06 +00:00
riscv Replace use of the pipe(2) system call with pipe2(2) with a zero flags 2016-06-22 21:11:27 +00:00
rpc Use on crypto.x and rpc.x from the source tree. 2016-06-28 19:53:16 +00:00
secure libc: do not include <sys/types.h> where <sys/param.h> was already included 2016-04-18 21:05:15 +00:00
softfloat libc: replace 0 with NULL for pointers. 2016-04-10 19:33:58 +00:00
sparc64 Replace use of the pipe(2) system call with pipe2(2) with a zero flags 2016-06-22 21:11:27 +00:00
stdio 1) Eliminate possibility to call __*collate_range_cmp() with inclomplete 2016-07-14 09:07:25 +00:00
stdlib Reflect error indication according to POSIX and what those functions 2016-06-05 15:46:14 +00:00
stdtime Implement (ACFLAGS|CFLAGS|CXXFLAGS).SRC globally. 2016-03-26 03:46:12 +00:00
string libc: spelling fixes. 2016-04-30 01:24:24 +00:00
sys Add more documentation regarding unsafe AIO requests. 2016-07-21 22:49:47 +00:00
tests Add a regression test to make sure the Russian collation is actually working 2016-07-15 23:43:23 +00:00
uuid libc: replace 0 with NULL for pointers. 2016-04-10 19:33:58 +00:00
xdr libc/xdr: unsign some loop indexes. 2016-05-06 16:03:40 +00:00
yp Use on crypto.x and rpc.x from the source tree. 2016-06-28 19:53:16 +00:00
libc.ldscript
Makefile Make armv6 hard float abi by default. Kill armv6hf. 2016-05-18 06:01:18 +00:00
Makefile.depend DIRDEPS_BUILD: Regenerate without local dependencies. 2016-02-24 17:20:11 +00:00
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