| Message ID | 20190426050039.17460-7-pagupta@redhat.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | virtio pmem driver | expand |
On Thu, Apr 25, 2019 at 10:03 PM Pankaj Gupta <pagupta@redhat.com> wrote: > > Dont support 'MAP_SYNC' with non-DAX files and DAX files > with asynchronous dax_device. Virtio pmem provides > asynchronous host page cache flush mechanism. We don't > support 'MAP_SYNC' with virtio pmem and xfs. > > Signed-off-by: Pankaj Gupta <pagupta@redhat.com> > --- > fs/xfs/xfs_file.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) Darrick, does this look ok to take through the nvdimm tree? > > diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c > index a7ceae90110e..f17652cca5ff 100644 > --- a/fs/xfs/xfs_file.c > +++ b/fs/xfs/xfs_file.c > @@ -1203,11 +1203,14 @@ xfs_file_mmap( > struct file *filp, > struct vm_area_struct *vma) > { > + struct dax_device *dax_dev; > + > + dax_dev = xfs_find_daxdev_for_inode(file_inode(filp)); > /* > - * We don't support synchronous mappings for non-DAX files. At least > - * until someone comes with a sensible use case. > + * We don't support synchronous mappings for non-DAX files and > + * for DAX files if underneath dax_device is not synchronous. > */ > - if (!IS_DAX(file_inode(filp)) && (vma->vm_flags & VM_SYNC)) > + if (!daxdev_mapping_supported(vma, dax_dev)) > return -EOPNOTSUPP; > > file_accessed(filp); > -- > 2.20.1 >
On Tue, May 07, 2019 at 08:37:01AM -0700, Dan Williams wrote: > On Thu, Apr 25, 2019 at 10:03 PM Pankaj Gupta <pagupta@redhat.com> wrote: > > > > Dont support 'MAP_SYNC' with non-DAX files and DAX files > > with asynchronous dax_device. Virtio pmem provides > > asynchronous host page cache flush mechanism. We don't > > support 'MAP_SYNC' with virtio pmem and xfs. > > > > Signed-off-by: Pankaj Gupta <pagupta@redhat.com> > > --- > > fs/xfs/xfs_file.c | 9 ++++++--- > > 1 file changed, 6 insertions(+), 3 deletions(-) > > Darrick, does this look ok to take through the nvdimm tree? <urk> forgot about this, sorry. :/ > > > > diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c > > index a7ceae90110e..f17652cca5ff 100644 > > --- a/fs/xfs/xfs_file.c > > +++ b/fs/xfs/xfs_file.c > > @@ -1203,11 +1203,14 @@ xfs_file_mmap( > > struct file *filp, > > struct vm_area_struct *vma) > > { > > + struct dax_device *dax_dev; > > + > > + dax_dev = xfs_find_daxdev_for_inode(file_inode(filp)); > > /* > > - * We don't support synchronous mappings for non-DAX files. At least > > - * until someone comes with a sensible use case. > > + * We don't support synchronous mappings for non-DAX files and > > + * for DAX files if underneath dax_device is not synchronous. > > */ > > - if (!IS_DAX(file_inode(filp)) && (vma->vm_flags & VM_SYNC)) > > + if (!daxdev_mapping_supported(vma, dax_dev)) > > return -EOPNOTSUPP; LGTM, and I'm fine with it going through nvdimm. Nothing in xfs-5.2-merge touches that function so it should be clean. Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> --D > > > > file_accessed(filp); > > -- > > 2.20.1 > >
> > On Tue, May 07, 2019 at 08:37:01AM -0700, Dan Williams wrote: > > On Thu, Apr 25, 2019 at 10:03 PM Pankaj Gupta <pagupta@redhat.com> wrote: > > > > > > Dont support 'MAP_SYNC' with non-DAX files and DAX files > > > with asynchronous dax_device. Virtio pmem provides > > > asynchronous host page cache flush mechanism. We don't > > > support 'MAP_SYNC' with virtio pmem and xfs. > > > > > > Signed-off-by: Pankaj Gupta <pagupta@redhat.com> > > > --- > > > fs/xfs/xfs_file.c | 9 ++++++--- > > > 1 file changed, 6 insertions(+), 3 deletions(-) > > > > Darrick, does this look ok to take through the nvdimm tree? > > <urk> forgot about this, sorry. :/ > > > > > > > diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c > > > index a7ceae90110e..f17652cca5ff 100644 > > > --- a/fs/xfs/xfs_file.c > > > +++ b/fs/xfs/xfs_file.c > > > @@ -1203,11 +1203,14 @@ xfs_file_mmap( > > > struct file *filp, > > > struct vm_area_struct *vma) > > > { > > > + struct dax_device *dax_dev; > > > + > > > + dax_dev = xfs_find_daxdev_for_inode(file_inode(filp)); > > > /* > > > - * We don't support synchronous mappings for non-DAX files. At > > > least > > > - * until someone comes with a sensible use case. > > > + * We don't support synchronous mappings for non-DAX files and > > > + * for DAX files if underneath dax_device is not synchronous. > > > */ > > > - if (!IS_DAX(file_inode(filp)) && (vma->vm_flags & VM_SYNC)) > > > + if (!daxdev_mapping_supported(vma, dax_dev)) > > > return -EOPNOTSUPP; > > LGTM, and I'm fine with it going through nvdimm. Nothing in > xfs-5.2-merge touches that function so it should be clean. > > Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Thank you for the review. Pankaj > > --D > > > > > > > file_accessed(filp); > > > -- > > > 2.20.1 > > > > >
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index a7ceae90110e..f17652cca5ff 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -1203,11 +1203,14 @@ xfs_file_mmap( struct file *filp, struct vm_area_struct *vma) { + struct dax_device *dax_dev; + + dax_dev = xfs_find_daxdev_for_inode(file_inode(filp)); /* - * We don't support synchronous mappings for non-DAX files. At least - * until someone comes with a sensible use case. + * We don't support synchronous mappings for non-DAX files and + * for DAX files if underneath dax_device is not synchronous. */ - if (!IS_DAX(file_inode(filp)) && (vma->vm_flags & VM_SYNC)) + if (!daxdev_mapping_supported(vma, dax_dev)) return -EOPNOTSUPP; file_accessed(filp);
Dont support 'MAP_SYNC' with non-DAX files and DAX files with asynchronous dax_device. Virtio pmem provides asynchronous host page cache flush mechanism. We don't support 'MAP_SYNC' with virtio pmem and xfs. Signed-off-by: Pankaj Gupta <pagupta@redhat.com> --- fs/xfs/xfs_file.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)