Allow calls to vm_pager_haspages with the object read locked
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Authored by jeff on Aug 18 2019, 8:44 AM.

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kib
markj

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rS351235: Permit vm_pager_has_page() to run with a shared lock. Introduce

Summary

Only the vnode pager required the exclusive lock and only because it wanted to drop and reacquire. I added macros to automate this which will likely be useful elsewhere as we do more read locking of objects.

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rS FreeBSD src repository - subversion

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Event Timeline

jeff created this revision.Aug 18 2019, 8:44 AM

Harbormaster completed remote builds in B25942: Diff 60960.Aug 18 2019, 8:44 AM

jeff retitled this revision from Allow read locked objects to call has_pages to Allow calls to vm_pager_haspages with the object read locked.Aug 18 2019, 8:46 AM

jeff edited the summary of this revision. (Show Details)

jeff added reviewers: kib, markj.

markj accepted this revision.Aug 19 2019, 4:02 PM

This revision is now accepted and ready to land.Aug 19 2019, 4:02 PM

kib accepted this revision.Aug 19 2019, 6:23 PM

Closed by commit rS351235: Permit vm_pager_has_page() to run with a shared lock. Introduce (authored by jeff). · Explain WhyAug 19 2019, 10:25 PM

This revision was automatically updated to reflect the committed changes.

jeff added a commit: rS351235: Permit vm_pager_has_page() to run with a shared lock. Introduce.

Herald added a subscriber: imp. · View Herald TranscriptAug 19 2019, 10:25 PM