Andrea,
Do you really need to do this ?
if (unlikely(!spin_trylock(&pagecache_lock))) {
/* we hold the page lock so the page cannot go away from under us */
spin_unlock(&pagemap_lru_lock);
spin_lock(&pagecache_lock);
spin_lock(&pagemap_lru_lock);
}
Have you actually seen bad hold times of pagecache_lock by
shrink_caches() ?
Its just that I prefer clear locking without those "tricks". (easier to
understand and harder to miss subtle details)
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This archive was generated by hypermail 2b29 : Sun Sep 30 2001 - 21:00:33 EST