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178682506f
As a deadlock avoidance measure, zfs_getpages() would only try to acquire a rangelock, falling back to a single-page read if this was not possible. However, this is incompatible with direct I/O. Instead, release the busy lock before trying to acquire the rangelock in blocking mode. This means that it's possible for the page to be replaced, so we have to re-lookup. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Brian Atkinson <batkinson@lanl.gov> Signed-off-by: Mark Johnston <markj@FreeBSD.org> Closes #16643 |
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