On Tue, 2005-02-15 at 11:07, Nikita Danilov wrote: > Andrew Morton <[EMAIL PROTECTED]> writes: > > > Badari Pulavarty <[EMAIL PROTECTED]> wrote: > >> > >> Yep. nobh_prepare_write() doesn't add any bufferheads. But > >> we call block_write_full_page() even for "nobh" case, which > >> does create bufferheads, attaches to the page and operates > >> on them.. > > > > hmm, yeah, OK, we'll attach bh's in that case. It's a rare case though - > > when a dirty page falls off the end of the LRU. There's no particular > > Maybe DB2 dirties pages through mmap? > > Nikita.
It does. Most databases dirty data using shared memory segments, but they do write to filesystem directly also. I am not looking at DB2 issue here. I am looking at bufferheads usage in general. Thanks, Badari - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
