On 11/05/2013 10:37 AM, Phillip Susi wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > I can not figure out what is waking up disks on resume from suspend. > I thought it was sd.c, and setting manage_start_stop = 0 should stop > that. It does stop the message printed saying it is being started, > yet the disk is still started, and this makes the resume take nearly > 10 seconds. So it seems sd_resume()'s attempt to start the disk is > pointless and redundant, and something else is starting up the disk. Are you using an ATA drive? Last time I checked, the spin up actually happened while the ata port is resumed(when it will be reset): https://lkml.org/lkml/2013/2/4/361 -Aaron > Oddly, if I unbind the sd driver ( echo 1 > > /sys/block/sdx/device/delete ), then after a resume the disk remains > off ( and spins up again on rescan ). > > I don't see why the kernel needs to delay completing the resume until > after the disks have spun up when they will automatically spin up when > accessed, which may be never ( thus they should be left spun down ), > but I can not find the culprit causing this. > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.14 (GNU/Linux) > Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ > > iQEcBAEBCgAGBQJSeFnWAAoJEJrBOlT6nu758QwIAJAhlQ5o6qDG9fm98w0j7MY9 > OYp/NTd/nO4LGPGaTob/JCyuMDPMtXCOdueLxStlqnBLnPgfANZWD+VSSbsm/uae > pzvjihe6uU+mTCbPW0MNPEiFpH2mfVY8NMhrAEI/n0j9fjgd7E33NI2fedymEDPk > LcgdOtdQP3VSMMs6pjPRpkpVBJG1g3Y6XPLV8IFj8RPz6lUj3k5qj45lsgf//Am8 > 5vD8SRoZZd7bZghqOCeUU2I/1kntKI5qz4cDUQq6wTVwqAuhLbpjFMOk5lX3gg/h > Q25FGU6Rc8nMyLw4eLbRA8Tvh2aLX5anPkdJqkb132ulbmqP7b8hjUZ4qtNQ/wA= > =JmIT > -----END PGP SIGNATURE----- > -- > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
