[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Xen-devel] Live-Patch application failure in core-scheduling mode
- To: Jürgen Groß <jgross@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxx>
- From: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx>
- Date: Thu, 6 Feb 2020 11:05:22 +0000
- Authentication-results: esa4.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none; spf=None smtp.pra=sergey.dyasli@xxxxxxxxxx; spf=Pass smtp.mailfrom=sergey.dyasli@xxxxxxxxxx; spf=None smtp.helo=postmaster@xxxxxxxxxxxxxxx
- Autocrypt: addr=sergey.dyasli@xxxxxxxxxx; keydata= xsFNBFtMVHEBEADc/hZcLexrB6vGTdGqEUsYZkFGQh6Z1OO7bCtM1go1RugSMeq9tkFHQSOc 9c7W9NVQqLgn8eefikIHxgic6tGgKoIQKcPuSsnqGao2YabsTSSoeatvmO5HkR0xGaUd+M6j iqv3cD7/WL602NhphT4ucKXCz93w0TeoJ3gleLuILxmzg1gDhKtMdkZv6TngWpKgIMRfoyHQ jsVzPbTTjJl/a9Cw99vuhFuEJfzbLA80hCwhoPM+ZQGFDcG4c25GQGQFFatpbQUhNirWW5b1 r2yVOziSJsvfTLnyzEizCvU+r/Ek2Kh0eAsRFr35m2X+X3CfxKrZcePxzAf273p4nc3YIK9h cwa4ZpDksun0E2l0pIxg/pPBXTNbH+OX1I+BfWDZWlPiPxgkiKdgYPS2qv53dJ+k9x6HkuCy i61IcjXRtVgL5nPGakyOFQ+07S4HIJlw98a6NrptWOFkxDt38x87mSM7aSWp1kjyGqQTGoKB VEx5BdRS5gFdYGCQFc8KVGEWPPGdeYx9Pj2wTaweKV0qZT69lmf/P5149Pc81SRhuc0hUX9K DnYBa1iSHaDjifMsNXKzj8Y8zVm+J6DZo/D10IUxMuExvbPa/8nsertWxoDSbWcF1cyvZp9X tUEukuPoTKO4Vzg7xVNj9pbK9GPxSYcafJUgDeKEIlkn3iVIPwARAQABzShTZXJnZXkgRHlh c2xpIDxzZXJnZXkuZHlhc2xpQGNpdHJpeC5jb20+wsGlBBMBCgA4FiEEkI7HMI5EbM2FLA1L Aa+w5JvbyusFAltMVHECGwMFCwkIBwIGFQoJCAsCBBYCAwECHgECF4AAIQkQAa+w5JvbyusW IQSQjscwjkRszYUsDUsBr7Dkm9vK65AkEACvL+hErqbQj5yTVNqvP1rVGsXvevViglSTkHD4 9LGwEk4+ne8N4DPcqrDnyqYFd42UxTjVyoDEXEIIoy0RHWCmaspYEDX8fVmgFG3OFoeA9NAv JHssHU6B2mDAQ6M3VDmAwTw+TbXL/c1wblgGAP9kdurydZL8bevTTUh7edfnm5pwaT9HLXvl xLjz5qyt6tKEowM0xPVzCKaj3Mf/cuZFOlaWiHZ0biOPC0JeoHuz4UQTnBBUKk+n2nnn72k9 37cNeaxARwn/bxcej9QlbrrdaNGVFzjCA/CIL0KjUepowpLN0+lmYjkPgeLNYfyMXumlSNag 9qnCTh0QDsCXS/HUHPeBskAvwNpGBCkfiP/XqJ+V618ZQ1sclHa9aWNnlIR/a8xVx25t/14V R8EX/045HUpyPU8hI/yw+Fw/ugJ8W0dFzFeHU5K2tEW2W0m3ZWWWgpcBSCB17DDLIPjGX1Qc J8jiVJ7E4rfvA1JBg9BxVw5LVuXg2FB6bqnDYALfY2ydATk+ZzMUAMMilaE7/5a2RMV4TYcd 8Cf77LdgO0pB3vF6z1QmNA2IbOICtJOXpmvHj+dKFUt5hFVbvqXbuAjlrwFktbAFVGxaeIYz nQ44lQu9JqDuSH5yOytdek24Dit8SgEHGvumyj17liCG6kNzxd+2xh3uaUCA5MIALy5mZ87B TQRbTFRxARAAwqL3u/cPDA+BhU9ghtAkC+gyC5smWUL1FwTQ9CwTqcQpKt85PoaHn8sc5ctt Aj2fNT/F2vqQx/BthVOdkhj9LCwuslqBIqbri3XUyMLVV/Tf+ydzHW2AjufCowwgBguxedD1 f9Snkv+As7ZgMg/GtDqDiCWBFg9PneKvr+FPPd2WmrI8Kium4X5Zjs/a6OGUWVcIBoPpu088 z/0tlKYjTFLhoIEsf6ll4KvRQZIyGxclg3RBEuN+wgMbKppdUf2DBXYeCyrrPx809CUFzcik O99drWti2CV1gF8bnbUvfCewxwqgVKtHl2kfsm2+/lgG4CTyvnvWqUyHICZUqISdz5GidaXn TcPlsAeo2YU2NXbjwnmxzJEP/4FxgsjYIUbbxdmsK+PGre7HmGmaDZ8K77L3yHr/K7AH8mFs WUM5KiW4SnKyIQvdHkZMpvE4XrrirlZ+JI5vE043GzzpS2CGo0NFQmDJLRbpN/KQY6dkNVgA L0aDxJtAO1rXKYDSrvpL80bYyskQ4ivUa06v9SM2/bHi9bnp3Nf/fK6ErWKWmDOHWrnTgRML oQpcxoVPxw2CwyWT1069Y/CWwgnbj34+LMwMUYhPEZMitABpQE74dEtIFh0c2scm3K2QGhOP KQK3szqmXuX6MViMZLDh/B7FXLQyqwMBnZygfzZFM9vpDskAEQEAAcLBjQQYAQoAIBYhBJCO xzCORGzNhSwNSwGvsOSb28rrBQJbTFRxAhsMACEJEAGvsOSb28rrFiEEkI7HMI5EbM2FLA1L Aa+w5Jvbyuvvbg//S3d1+XL568K5BTHXaYxSqCeMqYbV9rPhEHyk+rzKtwNXSbSO8x0xZutL gYV+nkW0KMPH5Bz3I1xiRKAkiX/JLcMfx2HAXJ1Cv2rpR6bxyCGBJmuwR68uMS/gKe6AWwTY q2kt1rtZPjGl9OwVoWGJKbu2pFBLWmLAnHlXOL6WDSE1Mz2Ah3jMHOaSyAgPu1XSNa600gMJ QrSxgbe7bW72gCjeHcrIjfv+uh5cZ5/J/edpWXRuE4Tz82nxudBIHE2vnQEoJrXOh2kAJiYs G+IllDqFKDPrnS0R3DenBNG0Ir8h9W6heETnhQUc9NDFCSr81Mp0fROdBfYZnQzgSZMjN2eY pkNEWshJER4ZYY+7hAmqI51HnsKuM46QINh00jJHRMykW3TBMlwnUFxZ0gplAecjCFC7g2zj g1qNxLnxMS4wCsyEVhCkPyYnS8zuoa4ZUH37CezD01Ph4O1saln5+M4blHCEAUpZIkTGpUoi SEwtoxu6EEUYfbcjWgzJCs023hbRykZlFALoRNCwVz/FnPuVu291jn9kjvCTEeE6g2dCtOrO ukuXzk1tIeeoggsU7AJ0bzP7QOEhEckaBbP4k6ic26LJGWNMinllePyEMXzsgmMHVN//8wDT NWaanhP/JZ1v5Mfn8s1chIqC0sJIw73RvvuBkOa+jx0OwW3RFoQ=
- Cc: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>, "sergey.dyasli@xxxxxxxxxx >> Sergey Dyasli" <sergey.dyasli@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>
- Delivery-date: Thu, 06 Feb 2020 11:05:57 +0000
- Ironport-sdr: fP5EoB3A6gCyOt35SIP0XmdlT/p17WHMqELBHpzWvKm1ts7lXp10KWrAnWliMbYNWR+oIK6X5G VTpYfjWm9UkiHwXZCVmk+gmFsyESVoZ3/qjmK2izcb15HoJ8ICXa6wgR+NMggh/VRkyEIgPUPc NMkX95XDeBzn2NFBEBmnbFrHZHiHNbiscposp0qWyjRC0BVQ/cYWc1hDD00YVJAK4+XUBomneK lGSWf+V9VDP+QfjBEnVQQhRvFhC1gN0u5phUpSlCd145yAdmj/4H81O3fQrQV1bZNWS191w9Wf j+4=
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 06/02/2020 09:57, Jürgen Groß wrote:
> On 05.02.20 17:03, Sergey Dyasli wrote:
>> Hello,
>>
>> I'm currently investigating a Live-Patch application failure in core-
>> scheduling mode and this is an example of what I usually get:
>> (it's easily reproducible)
>>
>> (XEN) [ 342.528305] livepatch: lp: CPU8 - IPIing the other 15 CPUs
>> (XEN) [ 342.558340] livepatch: lp: Timed out on semaphore in CPU
>> quiesce phase 13/15
>> (XEN) [ 342.558343] bad cpus: 6 9
>>
>> (XEN) [ 342.559293] CPU: 6
>> (XEN) [ 342.559562] Xen call trace:
>> (XEN) [ 342.559565] [<ffff82d08023f304>] R
>> common/schedule.c#sched_wait_rendezvous_in+0xa4/0x270
>> (XEN) [ 342.559568] [<ffff82d08023f8aa>] F
>> common/schedule.c#schedule+0x17a/0x260
>> (XEN) [ 342.559571] [<ffff82d080240d5a>] F
>> common/softirq.c#__do_softirq+0x5a/0x90
>> (XEN) [ 342.559574] [<ffff82d080278ec5>] F
>> arch/x86/domain.c#guest_idle_loop+0x35/0x60
>>
>> (XEN) [ 342.559761] CPU: 9
>> (XEN) [ 342.560026] Xen call trace:
>> (XEN) [ 342.560029] [<ffff82d080241661>] R _spin_lock_irq+0x11/0x40
>> (XEN) [ 342.560032] [<ffff82d08023f323>] F
>> common/schedule.c#sched_wait_rendezvous_in+0xc3/0x270
>> (XEN) [ 342.560036] [<ffff82d08023f8aa>] F
>> common/schedule.c#schedule+0x17a/0x260
>> (XEN) [ 342.560039] [<ffff82d080240d5a>] F
>> common/softirq.c#__do_softirq+0x5a/0x90
>> (XEN) [ 342.560042] [<ffff82d080279db5>] F
>> arch/x86/domain.c#idle_loop+0x55/0xb0
>>
>> The first HT sibling is waiting for the second in the LP-application
>> context while the second waits for the first in the scheduler context.
>>
>> Any suggestions on how to improve this situation are welcome.
>
> Can you test the attached patch, please? It is only tested to boot, so
> I did no livepatch tests with it.
Thank you for the patch! It seems to fix the issue in my manual testing.
I'm going to submit automatic LP testing for both thread/core modes.
--
Thanks,
Sergey
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel
|
