> Actually, I think it would make the kernel (negligibly) faster to bump
> f_pos before the vfs_write() call. Unless fget_light sets fput_needed
> or the write doesn't complete cleanly, you won't have to touch the
> file table entry again after vfs_write() returns. You can adjust
Any number of things can cause a short write to occur, and rewinding the
file position after the fact is just as bad. A sane app has to either
serialise the writes itself or use a thread safe API like pwrite().
-ben
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