Re: [patch 0/7] Asynchronous Notification for ATAPI devices (v2) - resend
On Sun, 06 May 2007 12:15:34 +0200 Tejun Heo <[EMAIL PROTECTED]> wrote: > 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. > > No objection from me. BTW, you're not setting ATA_FLAG_AN anywhere in > the patch series, will that be a separate patch? > > -- > tejun > Yes - unfortunately I realized I'd forgotten to add that file to my quilt patch about 5 minutes after I sent it :). I thought if there were no other revisions to this patch, I'd just send a separate one, otherwise I'd incorporate it into the next version. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [patch 0/7] Asynchronous Notification for ATAPI devices (v2) - resend
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. No objection from me. BTW, you're not setting ATA_FLAG_AN anywhere in the patch series, will that be a separate patch? -- tejun - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [patch 0/7] Asynchronous Notification for ATAPI devices (v2) - resend
On Fri, 04 May 2007 15:30:03 -0500 James Bottomley <[EMAIL PROTECTED]> 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-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [patch 0/7] Asynchronous Notification for ATAPI devices (v2) - resend
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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[patch 0/7] Asynchronous Notification for ATAPI devices (v2) - resend
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. Thanks! Kristen -- -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
