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/ 2 Years ago, thu, june 30, 2022, 11:24:51
How can I check to verify that zswap is enabled and working on my system?
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dmesg | grep zswap
That should be all you need to know if it's running. You should see a message along the lines of:
[ 1.241302] zswap: loading zswap
[ 1.241306] zswap: using zbud pool
[ 1.241310] zswap: using lzo compressor
You can see what it's doing with the following:
$ sudo grep -R . /sys/kernel/debug/zswap
/sys/kernel/debug/zswap/stored_pages:0
/sys/kernel/debug/zswap/pool_total_size:0
/sys/kernel/debug/zswap/duplicate_entry:0
/sys/kernel/debug/zswap/written_back_pages:0
/sys/kernel/debug/zswap/reject_compress_poor:0
/sys/kernel/debug/zswap/reject_kmemcache_fail:0
/sys/kernel/debug/zswap/reject_alloc_fail:0
/sys/kernel/debug/zswap/reject_reclaim_fail:0
/sys/kernel/debug/zswap/pool_limit_hit:0
The key parameters to look out for are stored_pages which is the number of compressed pages and written_back_pages which is the number of pages which have been written out to the swap file.
[#23672] Friday, July 1, 2022, 2 Years
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