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FS-Cache: Make cookie relinquishment wait for outstanding reads

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Make fscache_relinquish_cookie() log a warning and wait if there are any
outstanding reads left on the cookie it was given.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2012-12-20 21:52:35 +00:00
parent 37491a1339
commit ef46ed888e
3 changed files with 23 additions and 6 deletions
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10
fs/fscache/operation.c
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@@ -340,8 +340,14 @@ void fscache_put_operation(struct fscache_operation *op)
object = op->object;
if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags))
atomic_dec(&object->n_reads);
if (test_bit(FSCACHE_OP_DEC_READ_CNT, &op->flags)) {
if (atomic_dec_and_test(&object->n_reads)) {
clear_bit(FSCACHE_COOKIE_WAITING_ON_READS,
&object->cookie->flags);
wake_up_bit(&object->cookie->flags,
FSCACHE_COOKIE_WAITING_ON_READS);
}
}
/* now... we may get called with the object spinlock held, so we
* complete the cleanup here only if we can immediately acquire the