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Use pin_user_pages API for Direct I/O requests

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As of kernel v5.8, pin_user_pages* interfaced were introduced. These
interfaces use the FOLL_PIN flag. This is preferred interface now for
Direct I/O requests in the kernel. The reasoning for using this new
interface for Direct I/O requests is explained in the kernel
documenetation:
Documentation/core-api/pin_user_pages.rst

If pin_user_pages_unlocked is available, the all Direct I/O requests
will use this new API to stay uptodate with the kernel API requirements.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Brian Atkinson <batkinson@lanl.gov>
Closes #16856
This commit is contained in:
Brian Atkinson
2024-12-10 10:21:06 -07:00
committed by Brian Behlendorf
parent c6442bd3b6
commit 882a809983
4 changed files with 150 additions and 43 deletions
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config/kernel.m4
+2
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@@ -127,6 +127,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_MM_PAGE_SIZE
ZFS_AC_KERNEL_SRC_MM_PAGE_MAPPING
ZFS_AC_KERNEL_SRC_FILE
ZFS_AC_KERNEL_SRC_PIN_USER_PAGES
case "$host_cpu" in
powerpc*)
ZFS_AC_KERNEL_SRC_CPU_HAS_FEATURE
@@ -238,6 +239,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_MM_PAGE_MAPPING
ZFS_AC_KERNEL_1ARG_ASSIGN_STR
ZFS_AC_KERNEL_FILE
ZFS_AC_KERNEL_PIN_USER_PAGES
case "$host_cpu" in
powerpc*)
ZFS_AC_KERNEL_CPU_HAS_FEATURE