Mark,
Thanks for the education.
Phil
-----Original Message-----
From: Roddy, Mark [mailto:xxxxx@stratus.com]
Sent: Friday, January 12, 2001 10:38 AM
To: NT Developers Interest List
Subject: [ntdev] RE: What determines the IRQL of SCSI Miniport StartIo
routine?
I hate to disagree, but as scsiport serializes the miniport driver
completely, including serializing the isr, almost all calls by scsiport into
the miniport are done using KeSynchronizeExecution, i.e. at DIRQL not at
DISPATCH_LEVEL.
Mark Roddy
xxxxx@hollistech.com
www.hollistech.com
WindowsNT Windows 2000 Consulting Services
-----Original Message-----
From: Nemiroff, Daniel [mailto:xxxxx@intel.com]
Sent: Friday, January 12, 2001 1:34 PM
To: NT Developers Interest List
Subject: [ntdev] RE: What determines the IRQL of SCSI Miniport StartIo
routine?it is highly unlikely that your HwStartIo routine is being executed at
DIRQL. Based on my understanding of ScsiPort, HwStartIo gets
called in the
ScsiPort’s StartIo routine, which is always at DISPATCH_LEVEL.There is no way ScsiPort would deque SRB’s and send them to
you at DIRQL.
What is probably happening is that you are trying to deque
your own irps
from your own internal queues inside your ISR.-d
-----Original Message-----
From: Barila, Phil [mailto:xxxxx@intel.com]
Sent: Friday, January 12, 2001 9:13 AM
To: NT Developers Interest List
Subject: [ntdev] RE: What determines the IRQL of SCSI Miniport StartIo
routine?I’ve rarely seen it at DISPATCH_LEVEL. It’s most commonly at
DIRQL. I
stated below that it was just below DIRQL, but that was
before I read in
Inside Windows 2000 that (DIRQL = 27 - IRQ) on a uniprocessor
system. If
that is true, then it’s almost always at DIRQL, on Win2K SP1.Thanks,
Phil
-----Original Message-----
From: Nemiroff, Daniel [mailto:xxxxx@intel.com]
Sent: Friday, January 12, 2001 8:01 AM
To: NT Developers Interest List
Subject: [ntdev] RE: What determines the IRQL of SCSI Miniport StartIo
rou tine?HwStartIo should always come in at DISPATCH_LEVEL.
-----Original Message-----
From: Barila, Phil [mailto:xxxxx@intel.com]
Sent: Thursday, January 11, 2001 5:01 PM
To: NT Developers Interest List
Subject: [ntdev] What determines the IRQL of SCSI Miniport StartIo
routine?I’m seeking to satisfy curiosity about the IRQL, and the
answer could have
some effect on how I do some things I may be doing in the future.Using KeGetCurrentIrql(), I have discovered that the IRQL is
not always the
same, is mostly just below DIRQL, but never actually DIRQL.
Does anyone
have any rhyme or reason to how a given SRB arrives at a given IRQL?Thanks,
Phil
* Philip D. Barila | (503) 264-8386
* Intel Corp. | M/S JF2-53 Office JF2-2-G6
* Storage Architecture and Performance
* Internet Systems Lab
You are currently subscribed to ntdev as: xxxxx@intel.com
To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
You are currently subscribed to ntdev as: xxxxx@intel.com
To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
You are currently subscribed to ntdev as: xxxxx@intel.com
To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
You are currently subscribed to ntdev as: xxxxx@stratus.com
To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
You are currently subscribed to ntdev as: xxxxx@intel.com
To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
You are currently subscribed to ntdev as: $subst(‘Recip.EmailAddr’)
To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com