Brian Behlendorf 83b91ae1a4 Linux 5.10 compat: restore custom uio_prefaultpages() ... As part of commit 1c2358c1 the custom uio_prefaultpages() code was removed in favor of using the generic kernel provided iov_iter_fault_in_readable() interface. Unfortunately, it turns out that up until the Linux 4.7 kernel the function would only ever fault in the first iovec of the iov_iter. The result being uiomove_iov() may hang waiting for the page. This commit effectively restores the custom uio_prefaultpages() pages code for Linux 4.9 and earlier kernels which contain the troublesome version of iov_iter_fault_in_readable(). Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #11463 Closes #11484		2021-01-21 10:43:39 -08:00
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freebsd	Extending FreeBSD UIO Struct	2021-01-20 21:27:30 -08:00
linux	Linux 5.10 compat: restore custom uio_prefaultpages()	2021-01-21 10:43:39 -08:00