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Re: [Xen-devel] ADs over dom0 iSCSI = high page_count()
| To: | Joshua Nicholas <jnicholas@xxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] ADs over dom0 iSCSI = high page_count() |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 05 Dec 2008 20:31:51 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 05 Dec 2008 12:32:12 -0800 |
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| Thread-topic: | [Xen-devel] ADs over dom0 iSCSI = high page_count() |
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On 05/12/2008 18:44, "Joshua Nicholas" <jnicholas@xxxxxxxxxxxxxxx> wrote: > gnttab_copy_grant_page() can only return -EBUSY if the > page_mapcount() is set and thus the IO must have gone through > __gnttab_dma_map_page(). > > So is the page_count() also 0 in netback.c net_tx_action_dealloc() > when the entry has been pending too long and gnttab_copy_grant_page() > (called via copy_pending_req()) returns -EBUSY? > > How does the cleanup work when this item is deleted from the > pending_inuse_head due to -EBUSY being returned? The most likely person to answer these questions off the top of tehir head is Herbert Xu, who implemented many of these netback extensions. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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