Re: [patch 0/7] Asynchronous Notification for ATAPI devices (v2) - resend

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Device Mapper]
  Powered by Linux