Date: Thu, 14 May 2009 03:24:22 +0000 (UTC) From: Jeff Roberson <jeff@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/kern kern_descrip.c sys_generic.c tty.c uipc_syscalls.c vfs_syscalls.c src/sys/sys filedesc.h Message-ID: <200905140327.n4E3RFHg023621@repoman.freebsd.org>
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jeff 2009-05-14 03:24:22 UTC
FreeBSD src repository
Modified files:
sys/kern kern_descrip.c sys_generic.c tty.c
uipc_syscalls.c vfs_syscalls.c
sys/sys filedesc.h
Log:
SVN rev 192080 on 2009-05-14 03:24:22Z by jeff
- Implement a lockless file descriptor lookup algorithm in
fget_unlocked().
- Save old file descriptor tables created on expansion until
the entire descriptor table is freed so that pointers may be
followed without regard for expanders.
- Mark the file zone as NOFREE so we may attempt to reference
potentially freed files.
- Convert several fget_locked() users to fget_unlocked(). This
requires us to manage reference counts explicitly but reduces
locking overhead in the common case.
Revision Changes Path
1.349 +88 -33 src/sys/kern/kern_descrip.c
1.172 +4 -10 src/sys/kern/sys_generic.c
1.314 +7 -4 src/sys/kern/tty.c
1.277 +9 -16 src/sys/kern/uipc_syscalls.c
1.476 +5 -14 src/sys/kern/vfs_syscalls.c
1.79 +4 -0 src/sys/sys/filedesc.h
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