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authorMichael S. Tsirkin <mst@redhat.com>2011-05-20 02:11:14 +0300
committerRusty Russell <rusty@rustcorp.com.au>2011-05-30 11:14:16 +0930
commit7ab358c23cbf15cea08129cd722d1ce77433a94d (patch)
tree713d38823efda30222230314bcae26b919782f16 /kernel/capability.c
parent4423fe40b03f32b11e72ecfa03077e702e55d5a9 (diff)
virtio: add api for delayed callbacks
Add an API that tells the other side that callbacks should be delayed until a lot of work has been done. Implement using the new event_idx feature. Note: it might seem advantageous to let the drivers ask for a callback after a specific capacity has been reached. However, as a single head can free many entries in the descriptor table, we don't really have a clue about capacity until get_buf is called. The API is the simplest to implement at the moment, we'll see what kind of hints drivers can pass when there's more than one user of the feature. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'kernel/capability.c')
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