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Message-Id: <20081210133240.8fa798bf.akpm@linux-foundation.org> Date: Wed, 10 Dec 2008 13:32:40 -0800 From: Andrew Morton <akpm@...ux-foundation.org> To: CSights <csights@...tmail.fm> Cc: linux-kernel@...r.kernel.org, linux-usb@...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 (cc linux-usb) On Tue, 9 Dec 2008 18:12:33 -0500 CSights <csights@...tmail.fm> wrote: > 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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