NFS: Fix fscache read from NFS after cache error
Earlier commits refactored some NFS read code and removed nfs_readpage_async(), but neglected to properly fixup nfs_readpage_from_fscache_complete(). The code path is only hit when something unusual occurs with the cachefiles backing filesystem, such as an IO error or while a cookie is being invalidated. Mark page with PG_checked if fscache IO completes in error, unlock the page, and let the VM decide to re-issue based on PG_uptodate. When the VM reissues the readpage, PG_checked allows us to skip over fscache and read from the server. Link: https://marc.info/?l=linux-nfs&m=162498209518739 Fixes: 1e83b173 ("NFS: Add nfs_pageio_complete_read() and remove nfs_readpage_async()") Signed-off-by:Dave Wysochanski <dwysocha@redhat.com> Signed-off-by:
Trond Myklebust <trond.myklebust@hammerspace.com>
parent
e0340f16
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