Don't update the superblock s_rev_level during mount if it isn't
actually necessary, only if superblock features are being set by
the kernel. This was originally added for ext3 since it always
set the INCOMPAT_RECOVER and HAS_JOURNAL features during mount,
but this is not needed since no journal mode was added to ext4.
That will allow Geert to mount his 20-year-old ext2 rev 0.0 m68k
filesystem, as a testament of the backward compatibility of ext4.
Fixes: 0390131ba84f ("ext4: Allow ext4 to run without a journal")
Signed-off-by: Andreas Dilger <email address hidden>
Signed-off-by: Theodore Ts'o <email address hidden>
Signed-off-by: Greg Kroah-Hartman <email address hidden>
Signed-off-by: Stefan Bader <email address hidden>
cf263bd...
by
"zhangyi (F)" <email address hidden>
fs/ext4/inode.c: In function ‘ext4_expand_extra_isize’:
fs/ext4/inode.c:5979:19: error: request for member ‘bh’ in something not a structure or union
BUFFER_TRACE(iloc.bh, "get_write_access");
Fixes: c03b45b853f58 ("ext4, project: expand inode extra size if possible")
Signed-off-by: zhangyi (F) <email address hidden>
Signed-off-by: Theodore Ts'o <email address hidden>
Reviewed-by: Jan Kara <email address hidden>
Signed-off-by: Greg Kroah-Hartman <email address hidden>
Signed-off-by: Stefan Bader <email address hidden>
e4cb62a...
by
Martin Schwidefsky <email address hidden>
s390/mm: convert to the generic get_user_pages_fast code
Define the gup_fast_permitted to check against the asce_limit of the
mm attached to the current task, then replace the s390 specific gup
code with the generic implementation in mm/gup.c.
Signed-off-by: Martin Schwidefsky <email address hidden>
Signed-off-by: Greg Kroah-Hartman <email address hidden>
Signed-off-by: Stefan Bader <email address hidden>
d24b616...
by
Martin Schwidefsky <email address hidden>
s390/mm: make the pxd_offset functions more robust
Change the way how pgd_offset, p4d_offset, pud_offset and pmd_offset
walk the page tables. pgd_offset now always calculates the index for
the top-level page table and adds it to the pgd, this is either a
segment table offset for a 2-level setup, a region-3 offset for 3-levels,
region-2 offset for 4-levels, or a region-1 offset for a 5-level setup.
The other three functions p4d_offset, pud_offset and pmd_offset will
only add the respective offset if they dereference the passed pointer.
With the new way of walking the page tables a sequence like this from
mm/gup.c now works:
Avoid cache line miss dereferencing struct page if we can.
page_copy_sane() mostly deals with order-0 pages.
Extra cache line miss is visible on TCP recvmsg() calls dealing
with GRO packets (typically 45 page frags are attached to one skb).
Bringing the 45 struct pages into cpu cache while copying the data
is not free, since the freeing of the skb (and associated
page frags put_page()) can happen after cache lines have been evicted.
Signed-off-by: Eric Dumazet <email address hidden>
Cc: Al Viro <email address hidden>
Signed-off-by: Al Viro <email address hidden>
Cc: Matthew Wilcox <email address hidden>
Signed-off-by: Greg Kroah-Hartman <email address hidden>
Signed-off-by: Stefan Bader <email address hidden>
Users have reported intermittent occurrences of DIMM initialization
failures due to duplicate allocations of address capacity detected in
the labels, or errors of the form below, both have the same root cause.
nd namespace1.4: failed to track label: 0
WARNING: CPU: 17 PID: 1381 at drivers/nvdimm/label.c:863
Unfortunately those reports were typically with a busy parallel
namespace creation / destruction loop making it difficult to see the
components of the bug. However, Jane provided a simple reproducer using
the work-in-progress sub-section implementation.
When ndctl is reconfiguring a namespace it may take an existing defunct
/ disabled namespace and reconfigure it with a new uuid and other
parameters. Critically namespace_update_uuid() takes existing address
resources and renames them for the new namespace to use / reconfigure as
it sees fit. The bug is that this rename only happens in the resource
tracking tree. Existing labels with the old uuid are not reaped leading
to a scenario where multiple active labels reference the same span of
address range.
Teach namespace_update_uuid() to flag any references to the old uuid for
reaping at the next label update attempt.
Cc: <email address hidden>
Fixes: bf9bccc14c05 ("libnvdimm: pmem label sets and namespace instantiation")
Link: https://github.com/pmem/ndctl/issues/91
Reported-by: Jane Chu <email address hidden>
Reported-by: Jeff Moyer <email address hidden>
Reported-by: Erwin Tsaur <email address hidden>
Cc: Johannes Thumshirn <email address hidden>
Signed-off-by: Dan Williams <email address hidden>
Signed-off-by: Greg Kroah-Hartman <email address hidden>
Signed-off-by: Stefan Bader <email address hidden>
2f774df...
by
Roger Pau Monne <email address hidden>
xen/pvh: correctly setup the PV EFI interface for dom0
