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tweak to cache purge thing

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git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@1082 29311d96-e01e-0410-9327-a35deaab8ce9
This commit is contained in:
sageweil 2007-02-08 03:27:34 +00:00
parent 61a7f7bcdb
commit 7856be3d20
1 changed files with 9 additions and 2 deletions
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11
trunk/ceph/ebofs/BufferCache.h
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@ -75,12 +75,15 @@ class BufferHead : public LRUObject {
utime_t dirty_stamp;
bool want_to_expire; // wants to be at bottom of lru
public:
BufferHead(ObjectCache *o) :
oc(o), //cancellable_ioh(0), tx_epoch(0),
rx_ioh(0), tx_ioh(0), tx_block(0), partial_tx_to(0), partial_tx_epoch(0),
shadow_of(0),
ref(0), state(STATE_MISSING), epoch_modified(0), version(0), last_flushed(0)
ref(0), state(STATE_MISSING), epoch_modified(0), version(0), last_flushed(0),
want_to_expire(false)
{}
~BufferHead() {
unpin_shadows();
@ -512,6 +515,7 @@ class BufferCache {
}
void touch_bottom(BufferHead *bh) {
if (bh->is_dirty()) {
bh->want_to_expire = true;
lru_dirty.lru_bottouch(bh);
} else
lru_rest.lru_bottouch(bh);
@ -593,7 +597,10 @@ class BufferCache {
}
if (s != BufferHead::STATE_DIRTY && bh->get_state() == BufferHead::STATE_DIRTY) {
lru_dirty.lru_remove(bh);
lru_rest.lru_insert_mid(bh);
if (bh->want_to_expire)
lru_rest.lru_insert_bot(bh);
else
lru_rest.lru_insert_mid(bh);
dirty_bh.erase(bh);
}