ceph: only invalidate on check_caps if we actually have pages
The i_rdcache_gen value only implies we MAY have cached pages; actually check the mapping to see if it's worth bothering with an invalidate. Signed-off-by: Sage Weil <sage@newdream.net>
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@ -1534,7 +1534,7 @@ retry_locked:
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*/
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if ((!is_delayed || mdsc->stopping) &&
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ci->i_wrbuffer_ref == 0 && /* no dirty pages... */
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ci->i_rdcache_gen && /* may have cached pages */
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inode->i_data.nrpages && /* have cached pages */
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(file_wanted == 0 || /* no open files */
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(revoking & (CEPH_CAP_FILE_CACHE|
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CEPH_CAP_FILE_LAZYIO))) && /* or revoking cache */
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