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From: Dan Williams <dan.j.williams@intel.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: Linux MM <linux-mm@kvack.org>,
	linux-nvdimm <linux-nvdimm@lists.01.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	"Barror, Robert" <robert.barror@intel.com>
Subject: Hang / zombie process from Xarray page-fault conversion (bisected)
Date: Thu, 7 Mar 2019 22:16:17 -0800
Message-ID: <CAPcyv4hwHpX-MkUEqxwdTj7wCCZCN4RV-L4jsnuwLGyL_UEG4A@mail.gmail.com> (raw)

Hi Willy,

We're seeing a case where RocksDB hangs and becomes defunct when
trying to kill the process. v4.19 succeeds and v4.20 fails. Robert was
able to bisect this to commit b15cd800682f "dax: Convert page fault
handlers to XArray".

I see some direct usage of xa_index and wonder if there are some more
pmd fixups to do?

Other thoughts?

             reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-08  6:16 Dan Williams [this message]
2019-03-11 15:09 ` Matthew Wilcox
2019-03-12  3:35   ` Dan Williams
2019-03-12  4:37     ` Dave Chinner
2019-03-12 16:53       ` Barror, Robert
2019-03-14  7:34       ` Dan Williams
2019-03-15  2:26         ` Dave Chinner
2019-03-15  2:46           ` Dan Williams
2019-05-04 19:42           ` Matthew Wilcox

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