On Fri, 04 May 2007 15:30:03 -0500 James Bottomley <James.Bottomley@xxxxxxxxxxxx> wrote: > On Fri, 2007-05-04 at 11:12 -0700, Kristen Carlson Accardi wrote: > > This patch series implements Asynchronous Notification (AN) for SATA > > ATAPI devices as defined in SATA 2.5 and AHCI 1.1 and higher. Drives > > which support this feature will send a notification when new media is > > inserted and removed, preventing the need for user space to poll for > > new media. This support is exposed to user space via a flag that will > > be set in /sys/block/sr*/capability_flags. If the flag is set, user > > space can disable polling for the new media, and the genhd driver will > > send a KOBJ_CHANGE event with the envp set to MEDIA_CHANGE_EVENT=1. > > > > Note that this patch only implements support for directly attached > > drives - AN with drives attached to a port multiplier requires > > additional changes. > > I seem to remember when this came up before, the observation was made > that AENs occur for many more things than simple media change notices, > so we should probably have a more generic AEN handling mechanism. Is > there any plan to move in this direction > > James > In this implementation, we use kobject_uevent_env (vs. just kobject_uevent in the original implementation) to send a KOBJ_CHANGE with the enviroment value of MEDIA_CHANGE=1. For other asynchronous events, you could still use KOBJ_CHANGE with a different env value. - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
