On Mon, Jan 05, 2009 at 05:16:08PM +0900, Toshiyuki Okajima wrote: > > I was confirming whether the kernel to which your new patch is > applied can run without trouble. But unfortunately, I got a hangup > problem. Now I am investigating the root cause. After I > investigated it for a little time, I think calling log_wait_commit() > from journal_try_to_free_buffers() can cause it. Sounds like a deadlock caused by the fact that we're no longer masking __GFP_WAIT, probably on journal->j_wait_done_commit. Presumably the system came under pressure during a commit operation, which makes sense, and so we ended up with a deadlock between kjournald and kswapd. The fix is pretty simple; we just need to mask out the __GFP_WAIT in the filesystem-specific callback, since this is a restriction imposed by the filesystem's use of the jbd/jbd2 layer. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
