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    UBIFS: do not allocate too much · 6c0c42cd
    Artem Bityutskiy 提交于
    Bulk-read allocates 128KiB or more using kmalloc. The allocation
    starts failing often when the memory gets fragmented. UBIFS still
    works fine in this case, because it falls-back to standard
    (non-optimized) read method, though. This patch teaches bulk-read
    to allocate exactly the amount of memory it needs, instead of
    allocating 128KiB every time.
    
    This patch is also a preparation to the further fix where we'll
    have a pre-allocated bulk-read buffer as well. For example, now
    the @bu object is prepared in 'ubifs_bulk_read()', so we could
    path either pre-allocated or allocated information to
    'ubifs_do_bulk_read()' later. Or teaching 'ubifs_do_bulk_read()'
    not to allocate 'bu->buf' if it is already there.
    Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
    6c0c42cd
tnc.c 85.1 KB