On Wed, Feb 12, 2020 at 09:31:51AM -0800, santosh.shilimkar@xxxxxxxxxx wrote: > On 2/11/20 7:03 PM, John Hubbard wrote: > > From: Leon Romanovsky <leonro@xxxxxxxxxxxx> > > > > Convert net/rds to use the newly introduces pin_user_pages() API, > > which properly sets FOLL_PIN. Setting FOLL_PIN is now required for > > code that requires tracking of pinned pages. > > > > Note that this effectively changes the code's behavior: it now > > ultimately calls set_page_dirty_lock(), instead of set_page_dirty(). > > This is probably more accurate. > > > > As Christoph Hellwig put it, "set_page_dirty() is only safe if we are > > dealing with a file backed page where we have reference on the inode it > > hangs off." [1] > > > > [1] https://urldefense.com/v3/__https://lore.kernel.org/r/20190723153640.GB720@lst.de__;!!GqivPVa7Brio!OJHuecs9Iup5ig3kQBi_423uMMuskWhBQAdOICrY3UQ_ZfEaxt9ySY7E8y32Q7pk5tByyA$ > > > > Cc: Hans Westgaard Ry <hans.westgaard.ry@xxxxxxxxxx> > > Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxxxxxx> > > Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx> > > Signed-off-by: John Hubbard <jhubbard@xxxxxxxxxx> > > --- > Change looks fine to me. Just on safer side, we will try > to test this change with regression suite to make sure it > works as expected. Thanks Santosh, I wrote this patch before John's series was merged into the tree, but back then, Hans tested it and it worked, hope that it still works. :) > > For patch itself, > > Acked-by: Santosh Shilimkar <santosh.shilimkar@xxxxxxxxxx> >
