until it is unlocked (which means reading is finished). If there was anything wrong during reading,
page won't be marked with PG_uptodate, so the caller will know reading failed.
Regards,
Zhu Yanhai
2009/11/20 Darrin Thompson <darrinth@xxxxxxxxx>
I see several instances of code like below scattered throughout the
kernel. This is a good example:
page=read_cache_page(mapping,0,(filler_t *)mapping->a_ops->readpage,NULL);
dentry_dst=(struct dentry *)page;
if (IS_ERR(page))
goto out;
wait_on_page_locked(page);
if (!PageUptodate(page))
goto async_fail; // <<--- This I don't understand...
What events can lead to read_cache_page returning !PageUptodate? My goal
will be to try to exercise a similar handler to test some code.
--
Darrin
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