[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 5/8] gnttab: re-arrange struct active_grant_entry
While benign to 32-bit arches, this shrinks the size from 56 to 48 bytes on 64-bit ones (while still leaving a 16-bit hole). Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> --- a/xen/common/grant_table.c +++ b/xen/common/grant_table.c @@ -160,15 +160,15 @@ shared_entry_header(struct grant_table * struct active_grant_entry { uint32_t pin; /* Reference count information. */ domid_t domid; /* Domain being granted access. */ - struct domain *trans_domain; + unsigned int start:15; /* For sub-page grants, the start offset + in the page. */ + bool is_sub_page:1; /* True if this is a sub-page grant. */ + unsigned int length:16; /* For sub-page grants, the length of the + grant. */ grant_ref_t trans_gref; + struct domain *trans_domain; unsigned long frame; /* Frame being granted. */ unsigned long gfn; /* Guest's idea of the frame being granted. */ - unsigned is_sub_page:1; /* True if this is a sub-page grant. */ - unsigned start:15; /* For sub-page grants, the start offset - in the page. */ - unsigned length:16; /* For sub-page grants, the length of the - grant. */ spinlock_t lock; /* lock to protect access of this entry. see docs/misc/grant-tables.txt for locking protocol */ _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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