Date: Thu, 28 Dec 2023 17:01:32 +0100 From: Dimitry Andric <dim@FreeBSD.org> To: "lev@freebsd.org" <lev@FreeBSD.org> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS pool hangs (live-locks?) after adding L2ARC Message-ID: <3260F369-4F60-46E6-939A-B3668F347622@FreeBSD.org> In-Reply-To: <e30888e5-44c6-4ce5-b34a-312c6b1bad77@FreeBSD.org> References: <b587ebd2-2206-4025-84f5-c855aa59d7ee@FreeBSD.org> <88ae141a-93af-4f23-87c1-f44a99975a28@FreeBSD.org> <FA440727-D5FE-4B9F-AB28-FB591F9F4F07@FreeBSD.org> <e30888e5-44c6-4ce5-b34a-312c6b1bad77@FreeBSD.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 28 Dec 2023, at 16:03, Lev Serebryakov <lev@freebsd.org> wrote: >=20 > On 28.12.2023 15:16, Dimitry Andric wrote: >=20 >>>> I can not find any discussion about such problem on Internet. = Also, "live" system doesn't have these "z_int_X_Y" threads at all. >>>> I want my L2ARC, I've payed for this NVMe! >>>=20 >>> Any ideas? >> Do you know 100% sure that this new NVMe device is working correctly? = Are there any errors to be found in SMART information, dmesg or syslog? >=20 > I'm running "ssd-steadystate.fio" on this SSD now (not whole SSD but = only l2arc partition, which is 85% of whole SSD to have 15% = over-provisioning), after running `trim` on it. >=20 > Let see... >=20 > If you could advice better scenario for `fio` (with some TRIM added = for good measure?) I can run it too. If these tests all work, I would first try making a plain new zpool, = with just this one device under it, and with the same settings you are = using for the other zpools. Then mount the pool somewhere, and exercise it with whatever workload = you can find, to see if that too "locks up". If not, you may have found = some sort of problem specific to l2arc, and I would guess it is best to = take that upstream? If it does lock up, there is probably some sort of incompatibility = between your NVMe device and the FreeBSD driver. You could then try = using another driver, IIRC there are two different ones now? -Dimitry
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3260F369-4F60-46E6-939A-B3668F347622>