... shortly after > >>boot. > > > >NMIs in some thinkpads are bad trouble, they lock up ... e1000 chipset in the way (for > T60/X60 only). Make sure you are ... he has nmi_watchdog disabled - still the long pauses persist. (i've never seen that on my t60) ...

linux-kernel - Ingo Molnar - May 25 2007 - 02:58

... hard shortly after >> boot. > > NMIs in some thinkpads are bad trouble, they lock up the ... the e1000 chipset in the way (for T60/X60 only). Make sure you are using ... newer. See netdev archives for more on that. Auke - To unsubscribe from this list ...

linux-kernel - Kok, Auke - May 24 2007 - 18:13

... _never_ seen MESI starvation happen on dual-core > single-socket CPUs! ... rep_nop() that cpu_relax() is based on is > unconditional, so it's ... This patch boots fine on my T60 - but i never saw ... I can still reproduce the freezes with the utrace patch applied ...

linux-kernel - Miklos Szeredi - Jun 17 2007 - 17:46

... > 2.6.21-rt7, trace options on - can't reproduce > > > > Possibly something timing related ... starting the trace app, but still no > > bug. > > > > Any other ideas? > > perhaps try 2.6 ... 't hide the bug this time, I got one freeze pretty quickly. But ...

linux-kernel - Miklos Szeredi - May 25 2007 - 05:51

... some more info about this bug. It is gathered with > nmi_watchdog= ... _never_ seen MESI starvation happen on dual-core single-socket CPUs! ... rep_nop() that cpu_relax() is based on is unconditional, so it's ... This patch boots fine on my T60 - but i never saw ...

linux-kernel - Ingo Molnar - Jun 16 2007 - 06:37

... causes cacheline starvation?) Ingo ----------------------------------------------------> Subject: [patch] x86: fix spin-loop starvation bug From: Ingo Molnar ... Szeredi reported very long pauses (several seconds, sometimes more) on his T60 (with a ...

linux-kernel - Ingo Molnar - Jun 18 2007 - 04:12

... -bit and 64-bit) Ingo -----------------------------> Subject: [patch] x86: fix spin-loop starvation bug From: Ingo Molnar Miklos Szeredi reported very long pauses (several seconds, sometimes more) on his T60 (with a Core2Duo) ...

linux-kernel - Ingo Molnar - Jun 18 2007 - 08:36

... and fuse I get ocasional long periods (10-100s) of total ... it helps, post a report BUG: at mm/slab.c:777 ... pcie02] ACPI: AC Adapter [AC] (on-line) ACPI: Battery Slot [BAT0 ... disabled loop: module loaded thinkpad_acpi: ThinkPad ACPI Extras v0.14 thinkpad_acpi ...

linux-kernel - Miklos Szeredi - May 24 2007 - 08:04

On Mon, 18 Jun 2007 10:12:04 +0200 Ingo Molnar < ... .hu> wrote: > ----------------------------------------------------> > Subject: [patch] x86: fix spin-loop starvation bug > From: ... very long pauses (several seconds, sometimes > more) on his T60 (with a ...

linux-kernel - Andrew Morton - Jun 18 2007 - 04:20

... no lock counter. Ingo --------------------------> Subject: [patch] x86: fix spin-loop starvation bug From: Ingo Molnar ... Szeredi reported very long pauses (several seconds, sometimes more) on his T60 (with a Core2Duo) ...

linux-kernel - Ingo Molnar - Jun 18 2007 - 04:31

... the 32-bit kernel. Ingo -------------------------> Subject: [patch] x86: fix spin-loop starvation bug From: Ingo Molnar Miklos Szeredi reported very long pauses (several seconds, sometimes more) on his T60 (with a Core2Duo) ...

linux-kernel - Ingo Molnar - Jun 18 2007 - 05:38

... .hu> wrote: > > > ----------------------------------------------------> > > Subject: [patch] x86: fix spin-loop starvation bug > > From: ... very long pauses (several seconds, sometimes > > more) on his T60 (with ... did not help, This was on top of 2.6.17 ...

linux-kernel - Ravikiran G Thirumalai - Jun 19 2007 - 00:22

... issue is that locked instructions on x86 are serializing, which makes ... anything, it just hides the bug with timing. You can hide ... just be re-ordering things on you, so that your "delay ... fact entirely possible that the long freezes have always been there ...

linux-kernel - Linus Torvalds - Jun 21 2007 - 13:31

... s in fact entirely possible that the long freezes have always been > there, but ... up the timing! So > maybe the freezes existed before, but with timer interrupts ... kernels, with a similar result.) plus on the ptrace side, the wait_task_inactive() code ...

linux-kernel - Ingo Molnar - Jun 21 2007 - 16:16

... kernels, with a similar > > result.) > > > > plus on the ptrace side, the wait_task_inactive() ... SMM event delaying it for a long time) > > even considering that the ' ... 220499 220463 ERR: 0 and the freezes don't really change that. ...

linux-kernel - Miklos Szeredi - Jun 23 2007 - 06:36

On Thu, 24 May 2007, Miklos Szeredi wrote: > Tried nmi_watchdog=1, but then ... up hard shortly after > boot. NMIs in some thinkpads are bad trouble, they lock up the ... while it is servicing a SMI, and thinkpads do SMIs like crazy. -- "One disk to ...

linux-kernel - Henrique de Moraes Holschuh - May 24 2007 - 18:08

... If this solves the problem on your box then i'll ... This patch boots fine on my T60 - but i never saw ... it was rather a "fragile" bug anyway. But at least the ... waiters of rq->lock (observed on Core2Duo) + */ + smp_mb(); cpu_relax(); if (preempted ...

linux-kernel - Miklos Szeredi - Jun 18 2007 - 03:24

... is running, I will busy-loop on getting/releasing the > task_rq_lock > > and that ... of tasks doing simultaneously "busy-loop on getting/releasing" a spinlock should starve ... immune to such bugs: slowdown is OK but not freezing. Current behavior could ...

linux-kernel - Jarek Poplawski - Jun 20 2007 - 05:36

... void fill_worst_stack(unsigned long stack_left) +{ + unsigned long flags; + + /* + * On x64, we ... fill_ratio); + if (fill_ratio >= 90) + printk(" - BUG: that's quite high, please ... latency trace v1.1.5 on %s\n", + UTS_RELEASE); + seq_puts(m ...

linux-kernel - Miklos Szeredi - May 24 2007 - 10:03

... Boots and runs fine. Fixes the freezes as well, which is not such ... there is some lock being starved on *any* hw setup. > > Ingo, an ack ... like 2-3 nasty SMP bugs related to it in the ... the patience to debug this bug! Ingo - To unsubscribe from this ...

linux-kernel - Ingo Molnar - Jun 18 2007 - 14:02