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Groups > linux.kernel > #1501190
| From | "Martin K. Petersen" <martin.petersen@oracle.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RESEND PATCH] scsi: ufs: fix race between clock gating and devfreq scaling work |
| Date | 2016-10-14 22:50 +0200 |
| Message-ID | <sshAt-6iL-7@gated-at.bofh.it> (permalink) |
| References | <sreuZ-4zZ-5@gated-at.bofh.it> |
| Organization | Oracle Corporation |
>>>>> "Subhash" == Subhash Jadavani <subhashj@codeaurora.org> writes: Subhash> UFS devfreq clock scaling work may require clocks to be ON if Subhash> it need to execute some UFS commands hence it may request for Subhash> clock hold before issuing the command. But if UFS clock gating Subhash> work is already running in parallel, ungate work would end up Subhash> waiting for the clock gating work to finish and as clock gating Subhash> work would also wait for the clock scaling work to finish, we Subhash> would enter in deadlock state. Here is the call trace during Subhash> this deadlock state: Somebody from the UFS camp, please review! -- Martin K. Petersen Oracle Linux Engineering
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Re: [RESEND PATCH] scsi: ufs: fix race between clock gating and devfreq scaling work "Martin K. Petersen" <martin.petersen@oracle.com> - 2016-10-14 22:50 +0200 Re: [RESEND PATCH] scsi: ufs: fix race between clock gating and devfreq scaling work Subhash Jadavani <subhashj@codeaurora.org> - 2016-10-18 02:20 +0200
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