Dispatch Requests
in [Device Drivers]
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From: uba on 2 Feb 2010 10:24 Hello, In my USB filter driver (KMDF) I do not want to send write or read requests to lower stack as they arrive. I want to bundle them in a list and send them once the list is full. I tried it but my filter driver does not get the second request. If I send the request down the stack then i get the next request. Is there any way I can send a pending status to upper stack so that i get the next request even though i do not send the first one down the stack? Thanks nd Regards, kid
From: Don Burn on 2 Feb 2010 11:35 You have messed up your synchronization settings. Check what SynchronizationScope value of the WDF_OBJECT_ATTRIBUTES you are using for the device and the queue. Note, do not put them in a list, this is exactly the model for a manual queue. -- Don Burn (MVP, Windows DKD) Windows Filesystem and Driver Consulting Website: http://www.windrvr.com Blog: http://msmvps.com/blogs/WinDrvr Remove StopSpam to reply "uba" <kid07.uba(a)gmail.com> wrote in message news:a9a87b8c-dcee-441b-8d71-006155affaf9(a)w27g2000pre.googlegroups.com... > Hello, > > In my USB filter driver (KMDF) I do not want to send write or read > requests to lower stack as they arrive. I want to > bundle them in a list and send them once the list is full. > > I tried it but my filter driver does not get the second request. If I > send the request down the stack then i get the > next request. > > Is there any way I can send a pending status to upper stack so that i > get the next request even though i do not send the first one down the > stack? > > Thanks nd Regards, > kid > > > > > > > > __________ Information from ESET NOD32 Antivirus, version of virus > signature database 4828 (20100202) __________ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > __________ Information from ESET NOD32 Antivirus, version of virus signature database 4828 (20100202) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
From: Doron Holan [MSFT] on 2 Feb 2010 12:45 it may not be the sync settings, it may be the type of queue he created. did you create a sequential queue? if so, it will behave as you describe, presenting only one request at a time. if so, you need to create a parallel queue -- This posting is provided "AS IS" with no warranties, and confers no rights. "Don Burn" <burn(a)stopspam.windrvr.com> wrote in message news:e7C9GXCpKHA.4836(a)TK2MSFTNGP05.phx.gbl... > You have messed up your synchronization settings. Check what > SynchronizationScope value of the WDF_OBJECT_ATTRIBUTES you are using for > the device and the queue. Note, do not put them in a list, this is > exactly the model for a manual queue. > > > -- > Don Burn (MVP, Windows DKD) > Windows Filesystem and Driver Consulting > Website: http://www.windrvr.com > Blog: http://msmvps.com/blogs/WinDrvr > Remove StopSpam to reply > > > > "uba" <kid07.uba(a)gmail.com> wrote in message > news:a9a87b8c-dcee-441b-8d71-006155affaf9(a)w27g2000pre.googlegroups.com... >> Hello, >> >> In my USB filter driver (KMDF) I do not want to send write or read >> requests to lower stack as they arrive. I want to >> bundle them in a list and send them once the list is full. >> >> I tried it but my filter driver does not get the second request. If I >> send the request down the stack then i get the >> next request. >> >> Is there any way I can send a pending status to upper stack so that i >> get the next request even though i do not send the first one down the >> stack? >> >> Thanks nd Regards, >> kid >> >> >> >> >> >> >> >> __________ Information from ESET NOD32 Antivirus, version of virus >> signature database 4828 (20100202) __________ >> >> The message was checked by ESET NOD32 Antivirus. >> >> http://www.eset.com >> >> >> > > > > __________ Information from ESET NOD32 Antivirus, version of virus > signature database 4828 (20100202) __________ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > >
From: Maxim S. Shatskih on 2 Feb 2010 16:13 Can you use KMDF queues instead of handicrafted list? "uba" <kid07.uba(a)gmail.com> wrote in message news:a9a87b8c-dcee-441b-8d71-006155affaf9(a)w27g2000pre.googlegroups.com... > Hello, > > In my USB filter driver (KMDF) I do not want to send write or read > requests to lower stack as they arrive. I want to > bundle them in a list and send them once the list is full. > > I tried it but my filter driver does not get the second request. If I > send the request down the stack then i get the > next request. > > Is there any way I can send a pending status to upper stack so that i > get the next request even though i do not send the first one down the > stack? > > Thanks nd Regards, > kid > > > > > >
From: Brandon Wilson [MSFT] on 2 Feb 2010 16:31 The KMDF IoTarget also has an internal list it will hold requests in when it is stopped. You could keep the IoTarget you send to in a stopped state and then start it once you have reached your desired request threshold. "Maxim S. Shatskih" <maxim(a)storagecraft.com.no.spam> wrote in message news:#aJXQyEpKHA.1556(a)TK2MSFTNGP05.phx.gbl... > Can you use KMDF queues instead of handicrafted list? > > "uba" <kid07.uba(a)gmail.com> wrote in message > news:a9a87b8c-dcee-441b-8d71-006155affaf9(a)w27g2000pre.googlegroups.com... >> Hello, >> >> In my USB filter driver (KMDF) I do not want to send write or read >> requests to lower stack as they arrive. I want to >> bundle them in a list and send them once the list is full. >> >> I tried it but my filter driver does not get the second request. If I >> send the request down the stack then i get the >> next request. >> >> Is there any way I can send a pending status to upper stack so that i >> get the next request even though i do not send the first one down the >> stack? >> >> Thanks nd Regards, >> kid >> >> >> >> >> >>
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