From: Pavel Machek <pavel@ucw.cz> To: Akinobu Mita <akinobu.mita@gmail.com> Cc: linux-block@vger.kernel.org, linux-leds@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, Frank Steiner <fsteiner-mail1@bio.ifi.lmu.de>, Jacek Anaszewski <jacek.anaszewski@gmail.com>, Dan Murphy <dmurphy@ti.com>, Jens Axboe <axboe@kernel.dk>, "James E.J. Bottomley" <jejb@linux.ibm.com>, "Martin K. Petersen" <martin.petersen@oracle.com>, Hannes Reinecke <hare@suse.com> Subject: Re: [PATCH v4 4/5] block: introduce LED block device activity trigger Date: Sat, 17 Aug 2019 16:55:09 +0200 [thread overview] Message-ID: <20190817145509.GA18381@amd> (raw) In-Reply-To: <1565888399-21550-5-git-send-email-akinobu.mita@gmail.com> [-- Attachment #1: Type: text/plain, Size: 1507 bytes --] On Fri 2019-08-16 01:59:58, Akinobu Mita wrote: > This allows LEDs to be controlled by block device activity. > > We already have ledtrig-disk (LED disk activity trigger), but the lower > level disk drivers need to utilize ledtrig_disk_activity() to make the > LED blink. > > The LED block device trigger doesn't require the lower level drivers to > have any instrumentation. The activity is collected by polling the disk > stats. > > Example: > > echo block-nvme0n1 > /sys/class/leds/diy/trigger Lets use one trigger "block" and have the device as a parameter, please. We already have 1000 cpu triggers on 1000 cpu machines, and yes, its a disaster we'll need to fix. Lets not repeat the same mistake here. I guess it may be slightly more work. Sorry about that. Pavel > +++ b/include/linux/leds.h > +#else > + > +struct ledtrig_blk { > +}; > + Is the empty struct neccessary? > +static inline void ledtrig_blk_enable(struct gendisk *disk) > +{ > +} > + > +static inline void ledtrig_blk_disable(struct gendisk *disk) > +{ > +} > + > +static inline int ledtrig_blk_register(struct gendisk *disk) > +{ > + return 0; > +} > + > +static inline void ledtrig_blk_unregister(struct gendisk *disk) > +{ > +} Normally we put such empty functions on single lines... Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 181 bytes --]
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From: pavel@ucw.cz (Pavel Machek) Subject: [PATCH v4 4/5] block: introduce LED block device activity trigger Date: Sat, 17 Aug 2019 16:55:09 +0200 [thread overview] Message-ID: <20190817145509.GA18381@amd> (raw) In-Reply-To: <1565888399-21550-5-git-send-email-akinobu.mita@gmail.com> On Fri 2019-08-16 01:59:58, Akinobu Mita wrote: > This allows LEDs to be controlled by block device activity. > > We already have ledtrig-disk (LED disk activity trigger), but the lower > level disk drivers need to utilize ledtrig_disk_activity() to make the > LED blink. > > The LED block device trigger doesn't require the lower level drivers to > have any instrumentation. The activity is collected by polling the disk > stats. > > Example: > > echo block-nvme0n1 > /sys/class/leds/diy/trigger Lets use one trigger "block" and have the device as a parameter, please. We already have 1000 cpu triggers on 1000 cpu machines, and yes, its a disaster we'll need to fix. Lets not repeat the same mistake here. I guess it may be slightly more work. Sorry about that. Pavel > +++ b/include/linux/leds.h > +#else > + > +struct ledtrig_blk { > +}; > + Is the empty struct neccessary? > +static inline void ledtrig_blk_enable(struct gendisk *disk) > +{ > +} > + > +static inline void ledtrig_blk_disable(struct gendisk *disk) > +{ > +} > + > +static inline int ledtrig_blk_register(struct gendisk *disk) > +{ > + return 0; > +} > + > +static inline void ledtrig_blk_unregister(struct gendisk *disk) > +{ > +} Normally we put such empty functions on single lines... Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-nvme/attachments/20190817/55367839/attachment.sig>
next prev parent reply other threads:[~2019-08-17 14:55 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-08-15 16:59 [PATCH v4 0/5] introduce LED block device activity trigger Akinobu Mita 2019-08-15 16:59 ` Akinobu Mita 2019-08-15 16:59 ` [PATCH v4 1/5] block: umem: rename LED_* macros to MEMCTRL_LED_* Akinobu Mita 2019-08-15 16:59 ` Akinobu Mita 2019-08-15 16:59 ` [PATCH v4 2/5] scsi: mvsas: rename LED_* enums to SGPIO_LED_* Akinobu Mita 2019-08-15 16:59 ` Akinobu Mita 2019-08-15 16:59 ` [PATCH v4 3/5] scsi: nsp32: rename LED_* macros to EXT_PORT_LED_* Akinobu Mita 2019-08-15 16:59 ` Akinobu Mita 2019-08-15 16:59 ` [PATCH v4 4/5] block: introduce LED block device activity trigger Akinobu Mita 2019-08-15 16:59 ` Akinobu Mita 2019-08-17 14:55 ` Pavel Machek [this message] 2019-08-17 14:55 ` Pavel Machek 2019-08-17 20:07 ` Jacek Anaszewski 2019-08-17 20:07 ` Jacek Anaszewski 2019-08-19 14:38 ` Pavel Machek 2019-08-19 18:22 ` Jacek Anaszewski 2019-08-19 18:37 ` Jacek Anaszewski 2019-08-23 16:00 ` Akinobu Mita 2019-08-24 15:53 ` Jacek Anaszewski 2019-08-27 14:03 ` Akinobu Mita 2019-08-27 21:23 ` Jacek Anaszewski 2019-08-28 14:56 ` Akinobu Mita 2019-08-15 16:59 ` [PATCH v4 5/5] scsi: sd: stop polling disk stats by ledtrig-blk during runtime suspend Akinobu Mita 2019-08-15 16:59 ` Akinobu Mita 2019-08-16 19:52 ` Jacek Anaszewski 2019-08-16 19:52 ` Jacek Anaszewski
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