| Message ID | 1505839684-10046-2-git-send-email-a.perevalov@samsung.com |
|---|---|
| State | New |
| Headers | show |
| Series | calculate blocktime for postcopy live migration | expand |
* Alexey Perevalov (a.perevalov@samsung.com) wrote: > This commit adds modification for UFFD_FEATURE_SIGBUS and > UFFD_FEATURE_THREAD_ID. > > Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com> This should be replaced with just running the scripts/update-linux-headers.sh against a 4.14-rc1 checkout. That can be done as a separate patch or the first patch of this series. Dave > --- > linux-headers/linux/userfaultfd.h | 16 +++++++++++++++- > 1 file changed, 15 insertions(+), 1 deletion(-) > > diff --git a/linux-headers/linux/userfaultfd.h b/linux-headers/linux/userfaultfd.h > index 9701772..b43cf0d 100644 > --- a/linux-headers/linux/userfaultfd.h > +++ b/linux-headers/linux/userfaultfd.h > @@ -23,7 +23,9 @@ > UFFD_FEATURE_EVENT_REMOVE | \ > UFFD_FEATURE_EVENT_UNMAP | \ > UFFD_FEATURE_MISSING_HUGETLBFS | \ > - UFFD_FEATURE_MISSING_SHMEM) > + UFFD_FEATURE_MISSING_SHMEM | \ > + UFFD_FEATURE_SIGBUS | \ > + UFFD_FEATURE_THREAD_ID) > #define UFFD_API_IOCTLS \ > ((__u64)1 << _UFFDIO_REGISTER | \ > (__u64)1 << _UFFDIO_UNREGISTER | \ > @@ -78,6 +80,9 @@ struct uffd_msg { > struct { > __u64 flags; > __u64 address; > + union { > + __u32 ptid; > + } feat; > } pagefault; > > struct { > @@ -153,6 +158,13 @@ struct uffdio_api { > * UFFD_FEATURE_MISSING_SHMEM works the same as > * UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem > * (i.e. tmpfs and other shmem based APIs). > + * > + * UFFD_FEATURE_SIGBUS feature means no page-fault > + * (UFFD_EVENT_PAGEFAULT) event will be delivered, instead > + * a SIGBUS signal will be sent to the faulting process. > + * > + * UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will > + * be returned, if feature is not requested 0 will be returned. > */ > #define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0) > #define UFFD_FEATURE_EVENT_FORK (1<<1) > @@ -161,6 +173,8 @@ struct uffdio_api { > #define UFFD_FEATURE_MISSING_HUGETLBFS (1<<4) > #define UFFD_FEATURE_MISSING_SHMEM (1<<5) > #define UFFD_FEATURE_EVENT_UNMAP (1<<6) > +#define UFFD_FEATURE_SIGBUS (1<<7) > +#define UFFD_FEATURE_THREAD_ID (1<<8) > __u64 features; > > __u64 ioctls; > -- > 1.9.1 > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
On 09/20/2017 09:43 PM, Dr. David Alan Gilbert wrote: > * Alexey Perevalov (a.perevalov@samsung.com) wrote: >> This commit adds modification for UFFD_FEATURE_SIGBUS and >> UFFD_FEATURE_THREAD_ID. >> >> Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com> > This should be replaced with just running the > scripts/update-linux-headers.sh > against a 4.14-rc1 checkout. > > That can be done as a separate patch or the first patch > of this series. Ok, in case of separate patch it's reasonably to send modification for all headers.
diff --git a/linux-headers/linux/userfaultfd.h b/linux-headers/linux/userfaultfd.h index 9701772..b43cf0d 100644 --- a/linux-headers/linux/userfaultfd.h +++ b/linux-headers/linux/userfaultfd.h @@ -23,7 +23,9 @@ UFFD_FEATURE_EVENT_REMOVE | \ UFFD_FEATURE_EVENT_UNMAP | \ UFFD_FEATURE_MISSING_HUGETLBFS | \ - UFFD_FEATURE_MISSING_SHMEM) + UFFD_FEATURE_MISSING_SHMEM | \ + UFFD_FEATURE_SIGBUS | \ + UFFD_FEATURE_THREAD_ID) #define UFFD_API_IOCTLS \ ((__u64)1 << _UFFDIO_REGISTER | \ (__u64)1 << _UFFDIO_UNREGISTER | \ @@ -78,6 +80,9 @@ struct uffd_msg { struct { __u64 flags; __u64 address; + union { + __u32 ptid; + } feat; } pagefault; struct { @@ -153,6 +158,13 @@ struct uffdio_api { * UFFD_FEATURE_MISSING_SHMEM works the same as * UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem * (i.e. tmpfs and other shmem based APIs). + * + * UFFD_FEATURE_SIGBUS feature means no page-fault + * (UFFD_EVENT_PAGEFAULT) event will be delivered, instead + * a SIGBUS signal will be sent to the faulting process. + * + * UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will + * be returned, if feature is not requested 0 will be returned. */ #define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0) #define UFFD_FEATURE_EVENT_FORK (1<<1) @@ -161,6 +173,8 @@ struct uffdio_api { #define UFFD_FEATURE_MISSING_HUGETLBFS (1<<4) #define UFFD_FEATURE_MISSING_SHMEM (1<<5) #define UFFD_FEATURE_EVENT_UNMAP (1<<6) +#define UFFD_FEATURE_SIGBUS (1<<7) +#define UFFD_FEATURE_THREAD_ID (1<<8) __u64 features; __u64 ioctls;
This commit adds modification for UFFD_FEATURE_SIGBUS and UFFD_FEATURE_THREAD_ID. Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com> --- linux-headers/linux/userfaultfd.h | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-)