Hi , Thanks for ur input. but i didnt get the meaning of workqueue, do u mean taskqueues or tasklets ? as far as they are concerned , i think they also run in interrupt context? can u plz clear this? Thanks Savita
________________________________ From: Oliver Neukum [mailto:[EMAIL PROTECTED] Sent: Fri 10/7/2005 2:28 PM To: linux-usb-devel@lists.sourceforge.net Cc: Savita H. Neelannava Subject: Re: [linux-usb-devel] vmalloc interrupt context! Am Freitag, 7. Oktober 2005 09:14 schrieb Savita H. Neelannava: > Hi All, > > In my USB driver impementation i need to allocate large amount of memory > dynamically (10M). This i need to do as soon as i get data from USb device in > call back function or in tasklets, both run in interrupt context.I can't use > kmalloc(GFP_ATOMIC) or get_free_pages(GFP_ATOMIC) since they are limited in > size. i cant use vmalloc() which intern use kmalloc(GFP_KERNEL). Is there any > way to achieve this huge memory allocation in interrupt context? or it it not > at all possible? You can use a workqueue and schedule work on it from interrupt. Directly it is impossible. HTH Oliver SPAN Systems Corporation, Bangalore. "Steering Progress, Together" -------------------------------------------------------------------------------- This email message and any attachments is confidential and intended only for the use of an individual or entity named above and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If you are not the intended recipient, you are notified that any dissemination, distribution or copying of this email is strictly prohibited. If you have received this email in error, please notify us immediately by return email or [EMAIL PROTECTED] and destroy the original message. Opinions, conclusions, and other information in this message that do not relate to the official business of SPAN, shall be understood to be neither given nor endorsed by SPAN. ************************************************************** Scanned by MailScan Anti-Virus and Content Security Software. Visit http://www.mwti.net for more info on eScan and MailScan. ************************************************************** ------------------------------------------------------- This SF.Net email is sponsored by: Power Architecture Resource Center: Free content, downloads, discussions, and more. http://solutions.newsforge.com/ibmarch.tmpl _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
