Am 2017-12-29 21:35, schrieb Adam Borowski:
> resize2fs -b $DEV
> tune2fs -O metadata_csum $DEV
> fsck.ext4 -D $DEV
One thing is unclear to me. Reading this wiki:
https://ext4.wiki.kernel.org/index.php/Ext4_Metadata_Checksums
They say:
* Install Linux 3.6+ and e2fsprogs 1.43-WIP.
* modprobe crc32c-intel
* mkfs.ext4 -O metadata_csum,64bit /dev/path/to/disk
* mount /dev/path/to/disk /mountpoint -o journal_checksum
and:
Some recent CPUs (Intel and SPARC) provide a hardware accelerated CRC32c
implementation. For best performance you should ensure that these
modules load before any ext4 filesystems with checksums.
doing a lsmod on my system, I see:
$ lsmod|fgrep crc
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
crc16 16384 2 bluetooth,ext4
crc32c_generic 16384 0
crc32c_intel 24576 2
crc16 is used by ext4. Does that mean I am not using hardware
accelerated crc32c?
If not, what can I do to use hardware accelerated crc32c?
Is it possible to turn an existing ext4fs into one with crc32c?
How can I load module crc32c_intel before filesystems get mounted?
Jochen_______________________________________________
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