Page fault in file_cache_sync

[jessicah]

Was performing big copies with Tracker when it KDL'd (two copy operations at once), triggered by what looks like perhaps running out of vnodes...

[jessicah]

KDL

[phoudoin]

Well, guess that the vnode VMCache is not set or not valid anymore:

​https://cgit.haiku-os.org/haiku/tree/src/system/kernel/cache/file_cache.cpp#n1278

I also wonder in cache_prefetch_vnode() if the resource guard:

​https://cgit.haiku-os.org/haiku/tree/src/system/kernel/cache/file_cache.cpp#n964

... is not misplaced. What will forbid to exaust, on a big file, the whole vnode cache in the prefetch loop done below this check?

Shouldn't the check be moved in the while loop instead?