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David Hildenbrand
792b429db7
Especially once we hit one of the assertions in sanity_check_pinned_pages(), observing follow-up assertions failing in other code can give good clues about what went wrong, so use VM_WARN_ON_ONCE instead. While at it, let's just convert all VM_BUG_ON to VM_WARN_ON_ONCE as well. Add one comment for the pfn_valid() check. We have to introduce VM_WARN_ON_ONCE_VMA() to make that fly. Drop the BUG_ON after mmap_read_lock_killable(), if that ever returns something > 0 we're in bigger trouble. Convert the other BUG_ON's into VM_WARN_ON_ONCE as well, they are in a similar domain "should never happen", but more reasonable to check for during early testing. [david@redhat.com: use the _FOLIO variant where possible, per Lorenzo] Link: https://lkml.kernel.org/r/844bd929-a551-48e3-a12e-285cd65ba580@redhat.com Link: https://lkml.kernel.org/r/20250604140544.688711-1-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Suren Baghdasaryan <surenb@google.com> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Acked-by: SeongJae Park <sj@kernel.org> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.