Hello, Going to be turning these options off for now (zswap+zram) under 5.2 and hopefully this makes the machine stable again-but just wanted to point out under 5.1.xx never had any issues but with 5.2 the kernel crashes fairly quickly when performing heavy I/O with these options enabled: (note: compressed ram is still marked as experimental in the kernel as of 5.2)
Append line used: append="3w-sas.use_msi=1 nohugeiomap page_poison=1 pcie_aspm=off pti=on rootfstype=ext4 slub_debug=P zram.enabled=1 zram.num_devices=12 zswap.enabled=1 zswap.compressor=lz4 zswap.zpool=z3fold" $ diff -u .config .config-5.2.0-2 --- .config 2019-07-09 19:23:57.355550063 -0400 +++ .config-5.2.0-2 2019-07-09 12:44:31.803653032 -0400 @@ -790,10 +790,13 @@ CONFIG_CLEANCACHE=y CONFIG_FRONTSWAP=y # CONFIG_CMA is not set -# CONFIG_ZSWAP is not set -# CONFIG_ZPOOL is not set -# CONFIG_ZBUD is not set -# CONFIG_ZSMALLOC is not set +CONFIG_ZSWAP=y +CONFIG_ZPOOL=y +CONFIG_ZBUD=y +CONFIG_Z3FOLD=y +CONFIG_ZSMALLOC=y +CONFIG_PGTABLE_MAPPING=y +CONFIG_ZSMALLOC_STAT=y CONFIG_GENERIC_EARLY_IOREMAP=y # CONFIG_DEFERRED_STRUCT_PAGE_INIT is not set # CONFIG_IDLE_PAGE_TRACKING is not set @@ -1309,6 +1312,9 @@ # CONFIG_BLK_DEV_FD is not set CONFIG_CDROM=y # CONFIG_BLK_DEV_PCIESSD_MTIP32XX is not set +CONFIG_ZRAM=y +CONFIG_ZRAM_WRITEBACK=y +CONFIG_ZRAM_MEMORY_TRACKING=y # CONFIG_BLK_DEV_UMEM is not set CONFIG_BLK_DEV_LOOP=y CONFIG_BLK_DEV_LOOP_MIN_COUNT=8 As it kills the machine, I could only take screenshots of the crashes: http://installkernel.tripod.com/IMG_2068.jpg http://installkernel.tripod.com/IMG_2069.jpg http://installkernel.tripod.com/IMG_2070.jpg http://installkernel.tripod.com/IMG_2071.jpg Regards, Justin.
