1__LOCK_PAGE(9)            Memory Management in Linux            __LOCK_PAGE(9)
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NAME

6       __lock_page - get a lock on the page, assuming we need to sleep to get
7       it
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SYNOPSIS

10       void __lock_page(struct page * page);
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ARGUMENTS

13       page
14           the page to lock
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DESCRIPTION

17       Ugly. Running sync_page in state TASK_UNINTERRUPTIBLE is scary. If some
18       random driver's requestfn sets TASK_RUNNING, we could busywait. However
19       chances are that on the second loop, the block layer's plug list is
20       empty, so sync_page will then return in state TASK_UNINTERRUPTIBLE.
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23Kernel Hackers Manual 2.6.       November 2011                  __LOCK_PAGE(9)
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