Date: Sun, 12 Sep 2010 19:52:14 -0400 From: jhell <jhell@DataIX.net> To: Pawel Jakub Dawidek <pjd@freebsd.org> Cc: freebsd-fs@freebsd.org Subject: Re: Swap on ZFS Volume still panics? Message-ID: <4C8D67AE.4030802@DataIX.net> In-Reply-To: <AANLkTi=K=KGTW5spj6qcpjv3qjV%2BDsR4BVw4Wd%2BFq%2Bbt@mail.gmail.com> References: <AANLkTin4DAY%2BWXOpckWJCs437BGg0mjAFzRv%2BiDEG-F1@mail.gmail.com> <20100910073912.GC2007@garage.freebsd.pl> <4C8B2A56.8080809@DataIX.net> <AANLkTi=K=KGTW5spj6qcpjv3qjV%2BDsR4BVw4Wd%2BFq%2Bbt@mail.gmail.com>
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This is a multi-part message in MIME format. --------------060908070400070800040406 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 09/12/2010 17:14, App Deb wrote: > I just tried your settings (setting primary and secondary cache to none). > > (also tried it with checksum=off and volblocksize=4k, all together) > > It somewhat helped. In the beginning I though it would deadlock. The system > was inaccessible for ~10 minutes, but after that it managed to allocate the > required swap, and the system resumed. > > I measured the speed that it allocated swap and it was only around ~0.4MB/s > max. With the native freebsd-swap partition the speed using my "selfmade > memory filling program" it almost reaches native disk speeds (~80MB/s). > > I still see a problem here. > I agree, something is definitely amiss here. I created a sparse '-s' or no refreservation zvol of 2g with '-b' of 4k and saw a lot of pressure when it came to heavy swapping that was equal to the same amount of RAM available. While this was happening I was able to get a pretty peculiar crash dump that someone may or may not find useful. I can provide further information on this dump via, core.txt.NN or any other methods needed. backtrace attached. *BEWARE* Pawel, I have uploaded the core.txt.36 file encrypted to your public key at here for further review if you find the backtrace curious: http://bit.ly/cuyH3L Regards, - -- Dump header from device /dev/label/dumpdev Architecture: i386 Architecture Version: 2 Dump Length: 583663616B (556 MB) Blocksize: 512 Dumptime: Sun Sep 12 13:39:25 2010 Hostname: centel.dataix.local Magic: FreeBSD Kernel Dump Version String: FreeBSD 8.1-STABLE #0 r212427M 208:41f4fcc6ce0a Fri Sep 10 17:47:45 EDT 2010 "REST EXCLUDED" Panic String: vm_fault: fault on nofault entry, addr: 828a0000 Dump Parity: 2118336362 Bounds: 36 Dump Status: good jhell,v -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJMjWetAAoJEJBXh4mJ2FR+WqoH/08xRrORHKQiaxKea2D4G6jy iiG2r+Y3Xz632sa0VrNYRSDRtspXTUhR8ZJBPyItgQKcYsoT5WA+GcwN+yj19QlX sDXeNtVTiem0tFIavdiM2/gTIlQJj7F/sny08nQNQcgvyb2SSR/DHKd49o4gyCQG KtzP5Ea04R9Pc/OsPOVV9XNtWL06wxcACOTNRcHOrk7hFOuSku31jv2i+ohquKLV 2EpYYIXoO44hqHzYNDFCOqO4v+Iw72Ys00bitL71pg6+yWVFEYcAl04gNoNzJYud 7hAamvM5zE0Ah63tToEcFbYE0ufFAp4vRBXvEj44TJoHNl5MmCOgAUHQA4K4xjs= =E1EU -----END PGP SIGNATURE----- --------------060908070400070800040406 Content-Type: text/plain; name="bt.txt" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="bt.txt" IzEgIDB4ODA2NzRjOTEgaW4gYm9vdCAoaG93dG89MjYwKSBhdCAvdXNyL3NyYy9zeXMva2Vy bi9rZXJuX3NodXRkb3duLmM6NDE2CiMyICAweDgwNjc0ZjI1IGluIHBhbmljIChmbXQ9VmFy aWFibGUgImZtdCIgaXMgbm90IGF2YWlsYWJsZS4pIGF0IC91c3Ivc3JjL3N5cy9rZXJuL2tl cm5fc2h1dGRvd24uYzo1OTAKIzMgIDB4ODA4YzFhNGUgaW4gdm1fZmF1bHQgKG1hcD0weDgx NjkwMDAwLCB2YWRkcj0yMTkwMDgyMDQ4LCBmYXVsdF90eXBlPTEgJ1wwMDEnLCBmYXVsdF9m bGFncz0wKSBhdCAvdXNyL3NyYy9zeXMvdm0vdm1fZmF1bHQuYzoyODMKIzQgIDB4ODA5MWU2 NWIgaW4gdHJhcF9wZmF1bHQgKGZyYW1lPTB4YjQ1ZTFhNDQsIHVzZXJtb2RlPTAsIGV2YT0y MTkwMDgzOTc2KSBhdCAvdXNyL3NyYy9zeXMvaTM4Ni9pMzg2L3RyYXAuYzo4NDAKIzUgIDB4 ODA5MWYxNWMgaW4gdHJhcCAoZnJhbWU9MHhiNDVlMWE0NCkgYXQgL3Vzci9zcmMvc3lzL2kz ODYvaTM4Ni90cmFwLmM6NTMzCiM2ICAweDgwOTAyM2JjIGluIGNhbGx0cmFwICgpIGF0IC91 c3Ivc3JjL3N5cy9pMzg2L2kzODYvZXhjZXB0aW9uLnM6MTY2CiM3ICAweDgwOGQ4ZjVhIGlu IHZtX3Jlc2Vydl9sZXZlbF9pZmZ1bGxwb3AgKG09MHg4OTA5OTg3MCkgYXQgL3Vzci9zcmMv c3lzL3ZtL3ZtX3Jlc2Vydi5jOjUxMgojOCAgMHg4MDkxYjQ4NyBpbiBwbWFwX2VudGVyIChw bWFwPTB4ODRkNTg2MjAsIHZhPTg2MDE2NDA5NiwgYWNjZXNzPTEgJ1wwMDEnLCBtPTB4ODkw OTk4NzAsIHByb3Q9MyAnXDAwMycsIHdpcmVkPTApIGF0IC91c3Ivc3JjL3N5cy9pMzg2L2kz ODYvcG1hcC5jOjM0MzYKIzkgIDB4ODA4YzM0MWYgaW4gdm1fZmF1bHQgKG1hcD0weDg0ZDU4 NTcwLCB2YWRkcj04NjAxNjQwOTYsIGZhdWx0X3R5cGU9MSAnXDAwMScsIGZhdWx0X2ZsYWdz PVZhcmlhYmxlICJmYXVsdF9mbGFncyIgaXMgbm90IGF2YWlsYWJsZS4pIGF0IC91c3Ivc3Jj L3N5cy92bS92bV9mYXVsdC5jOjk0NQojMTAgMHg4MDkxZTU2OSBpbiB0cmFwX3BmYXVsdCAo ZnJhbWU9MHhiNDVlMWQzOCwgdXNlcm1vZGU9MSwgZXZhPTg2MDE2NDA5NikgYXQgL3Vzci9z cmMvc3lzL2kzODYvaTM4Ni90cmFwLmM6ODI4CiMxMSAweDgwOTFlZmNlIGluIHRyYXAgKGZy YW1lPTB4YjQ1ZTFkMzgpIGF0IC91c3Ivc3JjL3N5cy9pMzg2L2kzODYvdHJhcC5jOjQwMQoj MTIgMHg4MDkwMjNiYyBpbiBjYWxsdHJhcCAoKSBhdCAvdXNyL3NyYy9zeXMvaTM4Ni9pMzg2 L2V4Y2VwdGlvbi5zOjE2NgojMTMgMHgzMDYxNmZkZSBpbiA/PyAoKQo= --------------060908070400070800040406 Content-Type: application/octet-stream; name="bt.txt.sig" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="bt.txt.sig" iQEcBAABAgAGBQJMjWetAAoJEJBXh4mJ2FR+NoMH/1KUKsI44QYvf3ABcN8976Byem3JBMWn VjK1R3CnLtY8RKdaGgVSVcQPwnikTbosjr24wEP9v4iyzD+C8ix1S+0+wRct14fk6N4sB+5a pvnDFgk5uidxYbWLjLt3puw6wyKNbyttwen83HL9GB+ovMkHc4Rq3u6C9lDuiwzn4lnqXT9x z5VZgROKz/rjmcwLWb0nUquxQ6Qh8ZedwoQNS5luIOle+LJHLGm8b9gII24gDz0GIB/ovYSC PaOL6g4LJvgA1XLBEhw+iU1SA1ALy9i5Jf5c/GeuDepM5sYD+5XUpLNXQlqAvtFfCruJP5Y0 TUWavsff9tB6PmARB/pRIhA= --------------060908070400070800040406--
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