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Date: Thu, 11 Dec 2008 10:37:45 -0500 (EST) From: Alan Stern <stern@...land.harvard.edu> To: Andrew Morton <akpm@...ux-foundation.org> cc: CSights <csights@...tmail.fm>, <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 On Wed, 10 Dec 2008, Andrew Morton wrote: > (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... 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. Alan Stern -- 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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