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Re: [Xen-devel] swiotlb
| To: | Ky Srinivasan <ksrinivasan@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] swiotlb |
| From: | Don Dutile <ddutile@xxxxxxxxxx> |
| Date: | Thu, 13 Apr 2006 21:51:28 -0400 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx, Don Dutile <ddutile@xxxxxxxxxx> |
| Delivery-date: | Thu, 13 Apr 2006 18:51:49 -0700 |
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Ky,You are correct. I received this as a bugzilla on FC-5. Testing a solution now (replacing copy_to_user w/copy_to_user_inatomic). The other problem with the call to copy_to_user is that a kmap_atomic() is done just before it as well, and the thread can't be blocked before the kunmap_atomic() is invoked (after the copy_to_user()). Unfortunately, tomorrow is company holiday, so I won't complete the testing until Monday; need to get more memory to force swiotlb's sync_single() to do the copy (due to bounce IO). - Don Ky Srinivasan wrote: Given that the function __sync_single() can be called in an interrupt context, why do we call a potentially blocking function (__copy_to_user) from within this function? Regards, K. Y _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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