Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263574AbTFKShb (ORCPT ); Wed, 11 Jun 2003 14:37:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263590AbTFKSha (ORCPT ); Wed, 11 Jun 2003 14:37:30 -0400 Received: from 66-122-194-202.ded.pacbell.net ([66.122.194.202]:56495 "HELO mail.keyresearch.com") by vger.kernel.org with SMTP id S263574AbTFKSgw (ORCPT ); Wed, 11 Jun 2003 14:36:52 -0400 Subject: [PATCH] New x86_64 time code for 2.5.70 From: "Bryan O'Sullivan" To: ak@suse.de, vojtech@suse.cz Cc: discuss@x86-64.org, linux-kernel@vger.kernel.org Content-Type: multipart/mixed; boundary="=-miDEQXbCJ5tXjgdu0INz" Message-Id: <1055357432.17154.77.camel@serpentine.internal.keyresearch.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.0 Date: 11 Jun 2003 11:50:32 -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 21750 Lines: 720 --=-miDEQXbCJ5tXjgdu0INz Content-Type: text/plain Content-Transfer-Encoding: 7bit The time code for x86-64 in 2.5.70 isout of date and wildly unstable, setting the clock to the year 1,115,117 (!) during boot about 60% of the time. This subsequently causes other pieces of completely unrelated userspace software to crash randomly for no obvious reason once the system comes up. I've forward-ported Vojtech's time code from 2.4, fixing some locking along the way. The new code supports using the AMD8111 HPET for time calculations. It also works stably with the PIT/TSC on every boot, which is the source of the time problems in current 2.5. Right now, the only known problem is with the fixup of jiffies if a timer interrupt is lost, which I've hence turned off. There's preliminary support for using HPET for the gettimeofday vsyscall, but since vsyscalls are disabled on x86-64 for now, that's obviously untested. = trigger) + /* do nothing */ ; + while (hpet_readl(HPET_COUNTER) < trigger) + /* do nothing */ ; + } else { int c1, c2; outb_p(0x00, 0x43); c2 = inb_p(0x40); --- linux-2.5/include/asm-x86_64/fixmap.h 2003-06-11 11:43:32.000000000 -0700 +++ x86-64-2.5/include/asm-x86_64/fixmap.h 2003-06-09 15:50:07.000000000 -0700 @@ -35,6 +35,8 @@ enum fixed_addresses { VSYSCALL_LAST_PAGE, VSYSCALL_FIRST_PAGE = VSYSCALL_LAST_PAGE + ((VSYSCALL_END-VSYSCALL_START) >> PAGE_SHIFT) - 1, + VSYSCALL_HPET, + FIX_HPET_BASE, #ifdef CONFIG_X86_LOCAL_APIC FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */ #endif --- linux-2.5/arch/x86_64/kernel/acpi/boot.c 2003-06-11 11:43:09.000000000 -0700 +++ x86-64-2.5/arch/x86_64/kernel/acpi/boot.c 2003-06-10 10:36:47.000000000 -0700 @@ -244,9 +244,11 @@ return -1; } - hpet.address = hpet_tbl->addr.addrl | ((long) hpet_tbl->addr.addrh << 32); + vxtime.hpet_address = hpet_tbl->addr.addrl | + ((long) hpet_tbl->addr.addrh << 32); - printk(KERN_INFO "acpi: HPET id: %#x base: %#lx\n", hpet_tbl->id, hpet.address); + printk(KERN_INFO "acpi: HPET id: %#x base: %#lx\n", + hpet_tbl->id, vxtime.hpet_address); return 0; } --- linux-2.5/include/asm-x86_64/mc146818rtc.h 2003-06-11 11:43:32.000000000 -0700 +++ x86-64-2.5/include/asm-x86_64/mc146818rtc.h 2003-06-09 15:50:45.000000000 -0700 @@ -24,6 +24,11 @@ outb_p((val),RTC_PORT(1)); \ }) +#ifndef CONFIG_HPET_TIMER #define RTC_IRQ 8 +#else +/* Temporary workaround due to IRQ routing problem. */ +#define RTC_IRQ 0 +#endif #endif /* _ASM_MC146818RTC_H */ --- linux-2.5/include/asm-x86_64/timex.h 2003-06-11 11:43:32.000000000 -0700 +++ x86-64-2.5/include/asm-x86_64/timex.h 2003-06-10 10:48:06.000000000 -0700 @@ -30,6 +30,34 @@ extern unsigned int cpu_khz; -extern struct hpet_data hpet; +/* + * Documentation on HPET can be found at: + * http://www.intel.com/ial/home/sp/pcmmspec.htm + * ftp://download.intel.com/ial/home/sp/mmts098.pdf + */ + +#define HPET_ID 0x000 +#define HPET_PERIOD 0x004 +#define HPET_CFG 0x010 +#define HPET_STATUS 0x020 +#define HPET_COUNTER 0x0f0 +#define HPET_T0_CFG 0x100 +#define HPET_T0_CMP 0x108 +#define HPET_T0_ROUTE 0x110 + +#define HPET_ID_VENDOR 0xffff0000 +#define HPET_ID_LEGSUP 0x00008000 +#define HPET_ID_NUMBER 0x00000f00 +#define HPET_ID_REV 0x000000ff + +#define HPET_CFG_ENABLE 0x001 +#define HPET_CFG_LEGACY 0x002 + +#define HPET_T0_ENABLE 0x004 +#define HPET_T0_PERIODIC 0x008 +#define HPET_T0_SETVAL 0x040 +#define HPET_T0_32BIT 0x100 + +extern struct vxtime_data vxtime; #endif --- linux-2.5/arch/x86_64/kernel/time.c 2003-06-11 11:43:09.000000000 -0700 +++ x86-64-2.5/arch/x86_64/kernel/time.c 2003-06-11 10:20:49.000000000 -0700 @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #ifdef CONFIG_X86_LOCAL_APIC @@ -35,41 +36,59 @@ extern int using_apic_timer; spinlock_t rtc_lock = SPIN_LOCK_UNLOCKED; +spinlock_t i8253_lock = SPIN_LOCK_UNLOCKED; extern int using_apic_timer; extern void smp_local_timer_interrupt(struct pt_regs * regs); +#undef HPET_HACK_ENABLE_DANGEROUS + unsigned int cpu_khz; /* TSC clocks / usec, not used here */ unsigned long hpet_period; /* fsecs / HPET clock */ unsigned long hpet_tick; /* HPET clocks / interrupt */ -int hpet_report_lost_ticks; /* command line option */ +unsigned long vxtime_hz = 1193182; +int report_lost_ticks; /* command line option */ -struct hpet_data __hpet __section_hpet; /* address, quotient, trigger, hz */ +struct vxtime_data __vxtime __section_vxtime; /* for vsyscalls */ volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES; unsigned long __wall_jiffies __section_wall_jiffies = INITIAL_JIFFIES; struct timespec __xtime __section_xtime; struct timezone __sys_tz __section_sys_tz; +static inline void rdtscll_sync(unsigned long *tsc) +{ + sync_core(); + rdtscll(*tsc); +} + /* * do_gettimeoffset() returns microseconds since last timer interrupt was * triggered by hardware. A memory read of HPET is slower than a register read * of TSC, but much more reliable. It's also synchronized to the timer * interrupt. Note that do_gettimeoffset() may return more than hpet_tick, if a - * timer interrupt has happened already, but hpet.trigger wasn't updated yet. + * timer interrupt has happened already, but vxtime.trigger wasn't updated yet. * This is not a problem, because jiffies hasn't updated either. They are bound * together by xtime_lock. */ -inline unsigned int do_gettimeoffset(void) +static inline unsigned int do_gettimeoffset_tsc(void) { unsigned long t; - sync_core(); - rdtscll(t); - return (t - hpet.last_tsc) * (1000000L / HZ) / hpet.ticks + hpet.offset; + unsigned long x; + rdtscll_sync(&t); + x = ((t - vxtime.last_tsc) * vxtime.tsc_quot) >> 32; + return x; } +static inline unsigned int do_gettimeoffset_hpet(void) +{ + return ((hpet_readl(HPET_COUNTER) - vxtime.last) * vxtime.quot) >> 32; +} + +unsigned int (*do_gettimeoffset)(void) = do_gettimeoffset_tsc; + /* * This version of gettimeofday() has microsecond resolution and better than * microsecond precision, as we're using at least a 10 MHz (usually 14.31818 @@ -87,7 +106,8 @@ sec = xtime.tv_sec; usec = xtime.tv_nsec / 1000; - t = (jiffies - wall_jiffies) * (1000000L / HZ) + do_gettimeoffset(); + t = (jiffies - wall_jiffies) * (1000000L / HZ) + + do_gettimeoffset(); usec += t; } while (read_seqretry(&xtime_lock, seq)); @@ -178,8 +198,8 @@ CMOS_WRITE(real_seconds, RTC_SECONDS); CMOS_WRITE(real_minutes, RTC_MINUTES); } else - printk(KERN_WARNING "time.c: can't update CMOS clock from %d to %d\n", - cmos_minutes, real_minutes); + printk(KERN_WARNING "time.c: can't update CMOS clock " + "from %d to %d\n", cmos_minutes, real_minutes); /* * The following flags have to be released exactly in this order, otherwise the @@ -198,6 +218,9 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) { static unsigned long rtc_update = 0; + unsigned long tsc, lost = 0; + int delay, offset = 0; + static unsigned long call; /* * Here we are in the timer irq handler. We have irqs locally disabled (so we @@ -208,17 +231,53 @@ write_seqlock(&xtime_lock); - { - unsigned long t; + if (vxtime.hpet_address) { + offset = hpet_readl(HPET_T0_CMP) - hpet_tick; + delay = hpet_readl(HPET_COUNTER) - offset; + } else { + spin_lock(&i8253_lock); + outb_p(0x00, 0x43); + delay = inb_p(0x40); + delay |= inb(0x40) << 8; + spin_unlock(&i8253_lock); + delay = LATCH - 1 - delay; + } - sync_core(); - rdtscll(t); - hpet.offset = (t - hpet.last_tsc) * (1000000L / HZ) / hpet.ticks + hpet.offset - 1000000L / HZ; - if (hpet.offset >= 1000000L / HZ) - hpet.offset = 0; - hpet.ticks = min_t(long, max_t(long, (t - hpet.last_tsc) * (1000000L / HZ) / (1000000L / HZ - hpet.offset), - cpu_khz * 1000/HZ * 15 / 16), cpu_khz * 1000/HZ * 16 / 15); - hpet.last_tsc = t; + rdtscll_sync(&tsc); + + if (vxtime.mode == VXTIME_HPET) { + if (offset - vxtime.last > hpet_tick) { + lost = (offset - vxtime.last) / hpet_tick - 1; + } + + vxtime.last = offset; + } else { + offset = (((tsc - vxtime.last_tsc) * + vxtime.tsc_quot) >> 32) - tick_usec; + + if (offset > tick_usec) { + lost = offset / tick_usec; + offset %= tick_usec; + } + + vxtime.last_tsc = tsc - vxtime.quot * delay / vxtime.tsc_quot; + + if ((((tsc - vxtime.last_tsc) * + vxtime.tsc_quot) >> 32) < offset) + vxtime.last_tsc = tsc - + (((long) offset << 32) / vxtime.tsc_quot) - 1; + } + + if (lost) { + if (report_lost_ticks) + printk(KERN_WARNING "time.c: Lost %ld timer " + "tick(s)! (rip %016lx)\n", + (offset - vxtime.last) / hpet_tick - 1, + regs->rip); + // XXX The accounting of lost ticks is way off right + // now. -bos + + // jiffies += lost; } /* @@ -244,7 +303,7 @@ * If we have an externally synchronized Linux clock, then update CMOS clock * accordingly every ~11 minutes. set_rtc_mmss() will be called in the jiffy * closest to exactly 500 ms before the next second. If the update fails, we - * don'tcare, as it'll be updated on the next turn, and the problem (time way + * don't care, as it'll be updated on the next turn, and the problem (time way * off) isn't likely to go away much sooner anyway. */ @@ -254,6 +313,8 @@ rtc_update = xtime.tv_sec + 660; } + call++; + write_sequnlock(&xtime_lock); return IRQ_HANDLED; @@ -263,6 +324,7 @@ { unsigned int timeout, year, mon, day, hour, min, sec; unsigned char last, this; + unsigned long flags; /* * The Linux interpretation of the CMOS clock register contents: When the @@ -272,7 +334,7 @@ * standard 8.3 MHz ISA bus. */ - spin_lock(&rtc_lock); + spin_lock_irqsave(&rtc_lock, flags); timeout = 1000000; last = this = 0; @@ -295,7 +357,7 @@ mon = CMOS_READ(RTC_MONTH); year = CMOS_READ(RTC_YEAR); - spin_unlock(&rtc_lock); + spin_unlock_irqrestore(&rtc_lock, flags); /* * We know that x86-64 always uses BCD format, no need to check the config @@ -326,6 +388,32 @@ #define TICK_COUNT 100000000 +static unsigned int __init hpet_calibrate_tsc(void) +{ + int tsc_start, hpet_start; + int tsc_now, hpet_now; + unsigned long flags; + + local_irq_save(flags); + local_irq_disable(); + + hpet_start = hpet_readl(HPET_COUNTER); + rdtscl(tsc_start); + + do { + local_irq_disable(); + hpet_now = hpet_readl(HPET_COUNTER); + sync_core(); + rdtscl(tsc_now); + local_irq_restore(flags); + } while ((tsc_now - tsc_start) < TICK_COUNT && + (hpet_now - hpet_start) < TICK_COUNT); + + return (tsc_now - tsc_start) * 1000000000L + / ((hpet_now - hpet_start) * hpet_period / 1000); +} + + /* * pit_calibrate_tsc() uses the speaker output (channel 2) of * the PIT. This is better than using the timer interrupt output, @@ -344,6 +432,8 @@ local_irq_save(flags); local_irq_disable(); + spin_lock_irqsave(&i8253_lock, flags); + outb(0xb0, 0x43); outb((1193182 / (1000 / 50)) & 0xff, 0x42); outb((1193182 / (1000 / 50)) >> 8, 0x42); @@ -353,42 +443,145 @@ sync_core(); rdtscll(end); - - local_irq_restore(flags); + spin_unlock_irqrestore(&i8253_lock, flags); return (end - start) / 50; } +static int hpet_init(void) +{ + unsigned int cfg, id; + + if (!vxtime.hpet_address) + return -1; + set_fixmap_nocache(FIX_HPET_BASE, vxtime.hpet_address); + +/* + * Read the period, compute tick and quotient. + */ + + id = hpet_readl(HPET_ID); + + if (!(id & HPET_ID_VENDOR) || !(id & HPET_ID_NUMBER) || + !(id & HPET_ID_LEGSUP)) + return -1; + + hpet_period = hpet_readl(HPET_PERIOD); + if (hpet_period < 100000 || hpet_period > 100000000) + return -1; + + hpet_tick = (tick_nsec + hpet_period / 2) / hpet_period; + +/* + * Stop the timers and reset the main counter. + */ + + cfg = hpet_readl(HPET_CFG); + cfg &= ~(HPET_CFG_ENABLE | HPET_CFG_LEGACY); + hpet_writel(cfg, HPET_CFG); + hpet_writel(0, HPET_COUNTER); + hpet_writel(0, HPET_COUNTER + 4); + +/* + * Set up timer 0, as periodic with first interrupt to happen at hpet_tick, + * and period also hpet_tick. + */ + + hpet_writel(HPET_T0_ENABLE | HPET_T0_PERIODIC | HPET_T0_SETVAL | + HPET_T0_32BIT, HPET_T0_CFG); + hpet_writel(hpet_tick, HPET_T0_CMP); + hpet_writel(hpet_tick, HPET_T0_CMP); + +/* + * Go! + */ + + cfg |= HPET_CFG_ENABLE | HPET_CFG_LEGACY; + hpet_writel(cfg, HPET_CFG); + + return 0; +} + void __init pit_init(void) { + unsigned long flags; + + spin_lock_irqsave(&i8253_lock, flags); outb_p(0x34, 0x43); /* binary, mode 2, LSB/MSB, ch 0 */ outb_p(LATCH & 0xff, 0x40); /* LSB */ outb_p(LATCH >> 8, 0x40); /* MSB */ + spin_unlock_irqrestore(&i8253_lock, flags); } int __init time_setup(char *str) { - hpet_report_lost_ticks = 1; + report_lost_ticks = 1; return 1; } -static struct irqaction irq0 = { timer_interrupt, SA_INTERRUPT, 0, "timer", NULL, NULL}; +static struct irqaction irq0 = { + timer_interrupt, SA_INTERRUPT, 0, "timer", NULL, NULL +}; extern void __init config_acpi_tables(void); void __init time_init(void) { + char *timename; + +#ifdef HPET_HACK_ENABLE_DANGEROUS + if (!vxtime.hpet_address) { + printk(KERN_WARNING "time.c: WARNING: Enabling HPET base " + "manually!\n"); + outl(0x800038a0, 0xcf8); + outl(0xff000001, 0xcfc); + outl(0x800038a0, 0xcf8); + hpet_address = inl(0xcfc) & 0xfffffffe; + printk(KERN_WARNING "time.c: WARNING: Enabled HPET " + "at %#lx.\n", hpet_address); + } +#endif + xtime.tv_sec = get_cmos_time(); xtime.tv_nsec = 0; + if (!hpet_init()) { + vxtime_hz = (1000000000000000L + hpet_period / 2) / + hpet_period; + cpu_khz = hpet_calibrate_tsc(); + timename = "HPET"; + } else { pit_init(); - printk(KERN_INFO "time.c: Using 1.1931816 MHz PIT timer.\n"); cpu_khz = pit_calibrate_tsc(); + timename = "PIT"; + } + + printk(KERN_INFO "time.c: Using %ld.%06ld MHz %s timer.\n", + vxtime_hz / 1000000, vxtime_hz % 1000000, timename); printk(KERN_INFO "time.c: Detected %d.%03d MHz processor.\n", cpu_khz / 1000, cpu_khz % 1000); - hpet.ticks = cpu_khz * (1000 / HZ); - rdtscll(hpet.last_tsc); + vxtime.mode = VXTIME_TSC; + vxtime.quot = (1000000L << 32) / vxtime_hz; + vxtime.tsc_quot = (1000L << 32) / cpu_khz; + vxtime.hz = vxtime_hz; + rdtscll_sync(&vxtime.last_tsc); setup_irq(0, &irq0); } +void __init time_init_smp(void) +{ + char *timetype; + + if (vxtime.hpet_address) { + timetype = "HPET"; + vxtime.last = hpet_readl(HPET_T0_CMP) - hpet_tick; + vxtime.mode = VXTIME_HPET; + do_gettimeoffset = do_gettimeoffset_hpet; + } else { + timetype = "PIT/TSC"; + vxtime.mode = VXTIME_TSC; + } + printk(KERN_INFO "time.c: Using %s based timekeeping.\n", timetype); +} + __setup("report_lost_ticks", time_setup); --- linux-2.5/arch/x86_64/kernel/vsyscall.c 2003-06-11 11:43:09.000000000 -0700 +++ x86-64-2.5/arch/x86_64/kernel/vsyscall.c 2003-06-10 10:46:18.000000000 -0700 @@ -78,13 +78,21 @@ do { sequence = read_seqbegin(&__xtime_lock); - sync_core(); - rdtscll(t); sec = __xtime.tv_sec; usec = (__xtime.tv_nsec / 1000) + - (__jiffies - __wall_jiffies) * (1000000 / HZ) + - (t - __hpet.last_tsc) * (1000000 / HZ) / __hpet.ticks + __hpet.offset; + (__jiffies - __wall_jiffies) * (1000000 / HZ); + if (__vxtime.mode == VXTIME_TSC) { + sync_core(); + rdtscll(t); + usec += ((t - __vxtime.last_tsc) * + __vxtime.tsc_quot) >> 32; + } else { +#if 0 + usec += ((readl(fix_to_virt(VSYSCALL_HPET) + 0xf0) - + __vxtime.last) * __vxtime.quot) >> 32; +#endif + } } while (read_seqretry(&__xtime_lock, sequence)); tv->tv_sec = sec + usec / 1000000; --- linux-2.5/arch/x86_64/Kconfig 2003-06-11 11:43:09.000000000 -0700 +++ x86-64-2.5/arch/x86_64/Kconfig 2003-06-11 10:39:45.000000000 -0700 @@ -52,6 +52,18 @@ klogd/syslogd or the X server. You should normally N here, unless you want to debug such a crash. +config HPET_TIMER + bool + default n + help + Use the IA-PC HPET (High Precision Event Timer) to manage + time in preference to the PIT and RTC, if a HPET is + present. The HPET provides a stable time base on SMP + systems, unlike the RTC, but it is more expensive to access, + as it is off-chip. You can find the HPET spec at + . + + If unsure, say Y. config GENERIC_ISA_DMA bool --- linux-2.5/include/asm-x86_64/vsyscall.h 2003-06-11 11:43:32.000000000 -0700 +++ x86-64-2.5/include/asm-x86_64/vsyscall.h 2003-06-11 10:21:35.000000000 -0700 @@ -15,7 +15,7 @@ #ifdef __KERNEL__ -#define __section_hpet __attribute__ ((unused, __section__ (".hpet"), aligned(16))) +#define __section_vxtime __attribute__ ((unused, __section__ (".vxtime"), aligned(16))) #define __section_wall_jiffies __attribute__ ((unused, __section__ (".wall_jiffies"), aligned(16))) #define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16))) #define __section_sys_tz __attribute__ ((unused, __section__ (".sys_tz"), aligned(16))) @@ -23,22 +23,24 @@ #define __section_xtime __attribute__ ((unused, __section__ (".xtime"), aligned(16))) #define __section_xtime_lock __attribute__ ((unused, __section__ (".xtime_lock"), aligned(L1_CACHE_BYTES))) +#define VXTIME_TSC 1 +#define VXTIME_HPET 2 -struct hpet_data { - long address; /* base address */ +struct vxtime_data { + long hpet_address; /* HPET base address */ unsigned long hz; /* HPET clocks / sec */ - int trigger; /* value at last interrupt */ int last; - int offset; unsigned long last_tsc; - long ticks; + long quot; + long tsc_quot; + int mode; }; #define hpet_readl(a) readl(fix_to_virt(FIX_HPET_BASE) + a) #define hpet_writel(d,a) writel(d, fix_to_virt(FIX_HPET_BASE) + a) /* vsyscall space (readonly) */ -extern struct hpet_data __hpet; +extern struct vxtime_data __vxtime; extern struct timespec __xtime; extern volatile unsigned long __jiffies; extern unsigned long __wall_jiffies; @@ -46,7 +48,7 @@ extern seqlock_t __xtime_lock; /* kernel space (writeable) */ -extern struct hpet_data hpet; +extern struct vxtime_data vxtime; extern unsigned long wall_jiffies; extern struct timezone sys_tz; extern int sysctl_vsyscall; --- linux-2.5/arch/x86_64/kernel/smpboot.c 2003-06-11 11:43:09.000000000 -0700 +++ x86-64-2.5/arch/x86_64/kernel/smpboot.c 2003-06-10 12:30:52.000000000 -0700 @@ -67,6 +67,8 @@ /* Set when the idlers are all forked */ int smp_threads_ready; +extern void time_init_smp(void); + /* * Trampoline 80x86 program as an array. */ @@ -760,7 +762,7 @@ if (APIC_init_uniprocessor()) printk(KERN_NOTICE "Local APIC not detected." " Using dummy APIC emulation.\n"); - return; + goto smp_done; } /* @@ -784,7 +786,7 @@ cpu_online_map = phys_cpu_present_map = 1; phys_cpu_present_map = 1; disable_apic = 1; - return; + goto smp_done; } verify_local_APIC(); @@ -799,7 +801,7 @@ cpu_online_map = phys_cpu_present_map = 1; phys_cpu_present_map = 1; disable_apic = 1; - return; + goto smp_done; } connect_bsp_APIC(); @@ -883,6 +885,9 @@ */ if (cpu_has_tsc && cpucount) synchronize_tsc_bp(); + + smp_done: + time_init_smp(); } /* These are wrappers to interface to the new boot process. Someone --=-miDEQXbCJ5tXjgdu0INz-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/