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Message-Id: <200812111143.39619.csights@fastmail.fm> Date: Thu, 11 Dec 2008 11:43:39 -0500 From: CSights <csights@...tmail.fm> To: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org Subject: Re: idle USB harddrive spins up with 2.6.28-rc7 and 2.6.27.8, but not with 2.6.26.8 Hi LKML, > This is not a USB issue. usb-storage merely passes on to the device > the requests it gets from higher up. If those requests cause the drive > to spin-up or not spin-down, blame the higher-up subsystems. I am currently doing recompiles to see when the below problem first showed up. The change in behavior started somewhere between 2.6.27.5 and 2.6.27.8 . Eventually I will be able to say that the change occurred somewhere between 2.6.27.n and 2.6.27.n+1. I'm using an old k6 233 mHz, so it might take a few days! I am not a kernel hacker, but I would guess there was some change in the journal code that causes it to "leak" journal commits to a non-active device when triggered by the activity of another device. C. > > > Hi LKML, > > > I've got an IDE harddrive in a USB external enclosure. It is /dev/sda. > > > When I'm compiling the kernel or doing other things on /dev/hda1 the > > > USB harddrive (sda1) will spin-up or not spin-down. This happens with > > > kernel versions 2.6.28-rc7 and 2.6.27.8, but not with 2.6.26.8. > > > Also, I'm using laptop-mode-tools to turn on laptop mode. > > > I used the "btrace" script on /dev/sda while compiling a kernel on > > > /dev/hda1. While running 2.6.26.8 btrace did not output anything. With > > > 2.6.27.8 and 2.6.28-rc7 a load of stuff was going on with /dev/sda. > > > I don't know what it means, but it is probably what is causing the > > > harddrive to spin up. :) Hopefully someone besides me will consider > > > this a "regression". Let me know if you need any other info. > > > > > > Thanks! > > > C. > > > > > > Using 2.6.26.8, btrace of /dev/sda while compiling on /dev/hda1 > > > did not output anything. > > > > > > Using 2.6.27.8, btrace of /dev/sda while compiling on /dev/hda1 > > > Dec 9 11:15:32 localhost logger: 8,0 0 1 0.000000000 > > > 1109 A WS 14375 + 8 <- (8,1) 14312 > > > Dec 9 11:15:32 localhost logger: 8,0 0 2 0.000006705 > > > 1109 Q WS 14375 + 8 [kjournald] > > > Dec 9 11:15:32 localhost logger: 8,0 0 3 0.000043581 > > > 1109 G WS 14375 + 8 [kjournald] > > > Dec 9 11:15:32 localhost logger: 8,0 0 4 0.000065651 > > > 1109 P N [kjournald] > > > Dec 9 11:15:32 localhost logger: 8,0 0 5 0.000076267 > > > 1109 I W 14375 + 8 [kjournald] > > > Dec 9 11:15:32 localhost logger: 8,0 0 6 0.000300318 > > > 1109 D W 14375 + 8 [kjournald] > > > Dec 9 11:15:32 localhost logger: 8,0 0 7 0.000423518 > > > 1109 U N [kjournald] 1 > > > Dec 9 11:15:32 localhost logger: 8,0 0 8 0.010028373 > > > 3 C W 14375 + 8 [0] > > > Dec 9 11:15:35 localhost logger: 8,0 0 9 3.219049689 > > > 1109 A WS 14383 + 8 <- (8,1) 14320 > > > Dec 9 11:15:35 localhost logger: 8,0 0 10 3.219058350 > > > 1109 Q WS 14383 + 8 [kjournald] > > > Dec 9 11:15:35 localhost logger: 8,0 0 11 3.219095505 > > > 1109 G WS 14383 + 8 [kjournald] > > > Dec 9 11:15:35 localhost logger: 8,0 0 12 3.219115061 > > > 1109 P N [kjournald] > > > Dec 9 11:15:35 localhost logger: 8,0 0 13 3.219127074 > > > 1109 I W 14383 + 8 [kjournald] > > > Dec 9 11:15:35 localhost logger: 8,0 0 14 3.219344699 > > > 1109 D W 14383 + 8 [kjournald] > > > Dec 9 11:15:35 localhost logger: 8,0 0 15 3.219543607 > > > 1109 U N [kjournald] 1 > > > Dec 9 11:15:35 localhost logger: 8,0 0 16 3.229477275 > > > 3 C W 14383 + 8 [0] > > > Dec 9 11:15:40 localhost logger: 8,0 0 17 8.372429561 > > > 1109 A WS 14391 + 8 <- (8,1) 14328 > > > Dec 9 11:15:40 localhost logger: 8,0 0 18 8.372437663 > > > 1109 Q WS 14391 + 8 [kjournald] > > > Dec 9 11:15:40 localhost logger: 8,0 0 19 8.372474539 > > > 1109 G WS 14391 + 8 [kjournald] > > > Dec 9 11:15:40 localhost logger: 8,0 0 20 8.372496329 > > > 1109 P N [kjournald] > > > Dec 9 11:15:40 localhost logger: 8,0 0 21 8.372508063 > > > 1109 I W 14391 + 8 [kjournald] > > > Dec 9 11:15:40 localhost logger: 8,0 0 22 8.372729320 > > > 1109 D W 14391 + 8 [kjournald] > > > Dec 9 11:15:40 localhost logger: 8,0 0 23 8.372839669 > > > 1109 U N [kjournald] 1 > > > Dec 9 11:15:40 localhost logger: 8,0 0 24 8.382665781 > > > 3 C W 14391 + 8 [0] > > > Dec 9 11:15:49 localhost logger: 8,0 0 25 17.082110738 > > > 1109 A WS 14399 + 8 <- (8,1) 14336 > > > Dec 9 11:15:49 localhost logger: 8,0 0 26 17.082119119 > > > 1109 Q WS 14399 + 8 [kjournald] > > > Dec 9 11:15:49 localhost logger: 8,0 0 27 17.082156834 > > > 1109 G WS 14399 + 8 [kjournald] > > > Dec 9 11:15:49 localhost logger: 8,0 0 28 17.082180859 > > > 1109 P N [kjournald] > > > Dec 9 11:15:49 localhost logger: 8,0 0 29 17.082193431 > > > 1109 I W 14399 + 8 [kjournald] > > > Dec 9 11:15:49 localhost logger: 8,0 0 30 17.082418878 > > > 1109 D W 14399 + 8 [kjournald] > > > Dec 9 11:15:49 localhost logger: 8,0 0 31 17.082527831 > > > 1109 U N [kjournald] 1 > > > Dec 9 11:15:49 localhost logger: 8,0 0 32 17.092196101 > > > 3 C W 14399 + 8 [0] > > > ...etc... > > > > > > Using kernel 2.6.28-rc7, btrace of /dev/sda while compiling on > > > /dev/hda1 Dec 9 17:48:37 localhost logger: 8,0 0 1 > > > 0.000000000 1129 A WS 12567 + 8 <- (8,1) 12504 > > > Dec 9 17:48:37 localhost logger: 8,0 0 2 0.000005587 > > > 1129 Q WS 12567 + 8 [kjournald] > > > Dec 9 17:48:37 localhost logger: 8,0 0 3 0.000038553 > > > 1129 G WS 12567 + 8 [kjournald] > > > Dec 9 17:48:37 localhost logger: 8,0 0 4 0.000061460 > > > 1129 P N [kjournald] > > > Dec 9 17:48:37 localhost logger: 8,0 0 5 0.000074032 > > > 1129 I W 12567 + 8 [kjournald] > > > Dec 9 17:48:37 localhost logger: 8,0 0 6 0.000266235 > > > 1129 D W 12567 + 8 [kjournald] > > > Dec 9 17:48:37 localhost logger: 8,0 0 7 0.000372394 > > > 1129 U N [kjournald] 1 > > > Dec 9 17:48:37 localhost logger: 8,0 0 8 0.010619230 > > > 3 C W 12567 + 8 [0] > > > Dec 9 17:49:19 localhost logger: 8,0 0 9 41.770854333 > > > 1129 A WS 12575 + 8 <- (8,1) 12512 > > > Dec 9 17:49:19 localhost logger: 8,0 0 10 41.770862156 > > > 1129 Q WS 12575 + 8 [kjournald] > > > Dec 9 17:49:19 localhost logger: 8,0 0 11 41.770895121 > > > 1129 G WS 12575 + 8 [kjournald] > > > Dec 9 17:49:19 localhost logger: 8,0 0 12 41.770917191 > > > 1129 P N [kjournald] > > > Dec 9 17:49:19 localhost logger: 8,0 0 13 41.770929483 > > > 1129 I W 12575 + 8 [kjournald] > > > Dec 9 17:49:19 localhost logger: 8,0 0 14 41.771122524 > > > 1129 D W 12575 + 8 [kjournald] > > > Dec 9 17:49:19 localhost logger: 8,0 0 15 41.771247680 > > > 1129 U N [kjournald] 1 > > > Dec 9 17:49:19 localhost logger: 8,0 0 16 41.780654465 > > > 3 C W 12575 + 8 [0] > > > Dec 9 17:49:22 localhost logger: 8,0 0 17 44.820030708 > > > 1129 A WS 12583 + 8 <- (8,1) 12520 > > > Dec 9 17:49:22 localhost logger: 8,0 0 18 44.820038530 > > > 1129 Q WS 12583 + 8 [kjournald] > > > Dec 9 17:49:22 localhost logger: 8,0 0 19 44.820069539 > > > 1129 G WS 12583 + 8 [kjournald] > > > Dec 9 17:49:22 localhost logger: 8,0 0 20 44.820091050 > > > 1129 P N [kjournald] > > > Dec 9 17:49:22 localhost logger: 8,0 0 21 44.820103622 > > > 1129 I W 12583 + 8 [kjournald] > > > Dec 9 17:49:22 localhost logger: 8,0 0 22 44.820291914 > > > 1129 D W 12583 + 8 [kjournald] > > > Dec 9 17:49:22 localhost logger: 8,0 0 23 44.820386898 > > > 1129 U N [kjournald] 1 > > > Dec 9 17:49:22 localhost logger: 8,0 0 24 44.830135906 > > > 3 C W 12583 + 8 [0] > > > ...etc... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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