user/sven/linux.git/kernel/sys.c, branch v2.6.12.2

[PATCH] correctly name the Shell sort

2005-05-05T23:36:50Z

As per http://www.nist.gov/dads/HTML/shellsort.html, this should be referred to as a Shell sort. Shell-Metzner is a misnomer. Signed-off-by: Daniel Dickman Signed-off-by: Domen Puncer Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] convert that currently tests _NSIG directly to use valid_signal()

2005-05-01T15:59:14Z

Convert most of the current code that uses _NSIG directly to instead use valid_signal(). This avoids gcc -W warnings and off-by-one errors. Signed-off-by: Jesper Juhl Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] nice and rt-prio rlimits

2005-05-01T15:59:00Z

Add a pair of rlimits for allowing non-root tasks to raise nice and rt priorities. Defaults to traditional behavior. Originally written by Chris Wright. The patch implements a simple rlimit ceiling for the RT (and nice) priorities a task can set. The rlimit defaults to 0, meaning no change in behavior by default. A value of 50 means RT priority levels 1-50 are allowed. A value of 100 means all 99 privilege levels from 1 to 99 are allowed. CAP_SYS_NICE is blanket permission. (akpm: see http://www.uwsg.iu.edu/hypermail/linux/kernel/0503.1/1921.html for tips on integrating this with PAM). Signed-off-by: Matt Mackall Acked-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] use smp_mb/wmb/rmb where possible

2005-05-01T15:58:47Z

Replace a number of memory barriers with smp_ variants. This means we won't take the unnecessary hit on UP machines. Signed-off-by: Anton Blanchard Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Make lots of things static

2005-03-12T00:40:56Z

This is a megarollup of ~60 patches which give various things static scope. Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] make RLIMIT_CPU/SIGXCPU per-process

2005-03-08T02:17:44Z

POSIX requires that the RLIMIT_CPU resource limit that generates SIGXCPU be counted on a per-process basis. Currently, Linux implements this for individual threads. This patch fixes the semantics to conform with POSIX. The essential machinery for the process CPU limit is is tied into the new posix-timers code for process CPU clocks and timers. Signed-off-by: Roland McGrath Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] sys_setpriority() euid semantics fix

2005-03-08T01:51:06Z

What _is_ inconsistent is kernel/sys.c's setpriority()/set_one_prio(). It checks current->euid|uid against p->uid, which makes little sense, but is how we've been doing it ever since. It's a Linux quirk documented in the manpage. To make things funnier, SuS requires current->euid|uid match against p->euid. The patch below fixes it (and brings the logic in line with what setscheduler()/setaffinity() does), but if we do it then it should be done only in 2.6.12 or later, after good exposure in -mm. (Worst-case this could break an application but i highly doubt it: it at most could deny renicing another task to positive (or in very rare cases, to negative) nice values, which no application should crash on something like that, normally.) Signed-off-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] cputime: introduce cputime

2005-01-11T09:40:38Z

This patch introduces the concept of (virtual) cputime. Each architecture can define its method to measure cputime. The main idea is to define a cputime_t type and a set of operations on it (see asm-generic/cputime.h). Then use the type for utime, stime, cutime, cstime, it_virt_value, it_virt_incr, it_prof_value and it_prof_incr and use the cputime operations for each access to these variables. The default implementation is jiffies based and the effect of this patch for architectures which use the default implementation should be neglectible. There is a second type cputime64_t which is necessary for the kernel_stat cpu statistics. The default cputime_t is 32 bit and based on HZ, this will overflow after 49.7 days. This is not enough for kernel_stat (ihmo not enough for a processes too), so it is necessary to have a 64 bit type. The third thing that gets introduced by this patch is an additional field for the /proc/stat interface: cpu steal time. An architecture can account cpu steal time by calls to the account_stealtime function. The cpu which backs a virtual processor doesn't spent all of its time for the virtual cpu. To get meaningful cpu usage numbers this involuntary wait time needs to be accounted and exported to user space. From: Hugh Dickins The p->signal check in account_system_time is insufficient. If the timer interrupt hits near the end of exit_notify, after EXIT_ZOMBIE has been set, another cpu may release_task (NULLifying p->signal) in between account_system_time's check and check_rlimit's dereference. Nor should account_it_prof risk send_sig. But surely account_user_time is safe? Signed-off-by: Hugh Dickins Signed-off-by: Martin Schwidefsky Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Lock initializer cleanup (Core)

2005-01-08T06:09:06Z

Kernel core files converted to use the new lock initializers. Signed-off-by: Thomas Gleixner Acked-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] x86-64: kernel/sys.c build fix

2005-01-07T00:29:15Z

On x86-64, the attached patch is required to fix > kernel/sys.c: In function `sys_setsid': > kernel/sys.c:1078: error: `tty_sem' undeclared (first use in this function) > kernel/sys.c:1078: error: (Each undeclared identifier is reported only once > kernel/sys.c:1078: error: for each function it appears in.) kernel/sys.c needs the tty_sem declaration from linux/tty.h.