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Code improvement and bug fixes for QAT support

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1. Support QAT when ZFS is root file-system:
   When ZFS module is loaded before QAT started, the QAT can
   be started again in post-process, e.g.:
   echo 0 > /sys/module/zfs/parameters/zfs_qat_compress_disable
   echo 0 > /sys/module/zfs/parameters/zfs_qat_encrypt_disable
   echo 0 > /sys/module/zfs/parameters/zfs_qat_checksum_disable
2. Verify alder checksum of the de-compress result
3. Allocate Digest, IV and AAD buffer in physical contiguous
   memory by QAT_PHYS_CONTIG_ALLOC.
4. Update the documentation for zfs_qat_compress_disable,
   zfs_qat_checksum_disable, zfs_qat_encrypt_disable.

Reviewed-by: Tom Caputi <tcaputi@datto.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Weigang Li <weigang.li@intel.com>
Signed-off-by: Chengfeix Zhu <chengfeix.zhu@intel.com>
Closes #8323 
Closes #8610
This commit is contained in:
cfzhu
2019-04-17 03:38:36 +08:00
committed by Brian Behlendorf
parent 59f6594cf6
commit 5090f72743
5 changed files with 182 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files
man/man5/zfs-module-parameters.5
+39 -13
View File
@@ -2042,6 +2042,45 @@ can't hurt performance.
Use \fB1\fR for yes and \fB0\fR for no (default).
.RE
.sp
.ne 2
.na
\fBzfs_qat_checksum_disable\fR (int)
.ad
.RS 12n
This tunable disables qat hardware acceleration for sha256 checksums. It
may be set after the zfs modules have been loaded to initialize the qat
hardware as long as support is compiled in and the qat driver is present.
.sp
Use \fB1\fR for yes and \fB0\fR for no (default).
.RE
.sp
.ne 2
.na
\fBzfs_qat_compress_disable\fR (int)
.ad
.RS 12n
This tunable disables qat hardware acceleration for gzip compression. It
may be set after the zfs modules have been loaded to initialize the qat
hardware as long as support is compiled in and the qat driver is present.
.sp
Use \fB1\fR for yes and \fB0\fR for no (default).
.RE
.sp
.ne 2
.na
\fBzfs_qat_encrypt_disable\fR (int)
.ad
.RS 12n
This tunable disables qat hardware acceleration for AES-GCM encryption. It
may be set after the zfs modules have been loaded to initialize the qat
hardware as long as support is compiled in and the qat driver is present.
.sp
Use \fB1\fR for yes and \fB0\fR for no (default).
.RE
.sp
.ne 2
.na
@@ -2961,19 +3000,6 @@ Valid values are \fB1\fR (full), \fB2\fR (dev) and \fB3\fR (none).
Default value: \fB1\fR.
.RE
.sp
.ne 2
.na
\fBzfs_qat_disable\fR (int)
.ad
.RS 12n
This tunable disables qat hardware acceleration for gzip compression and.
AES-GCM encryption. It is available only if qat acceleration is compiled in
and the qat driver is present.
.sp
Use \fB1\fR for yes and \fB0\fR for no (default).
.RE
.SH ZFS I/O SCHEDULER
ZFS issues I/O operations to leaf vdevs to satisfy and complete I/Os.
The I/O scheduler determines when and in what order those operations are