kswapd in D state does slow down the whole system
This document (7007279) is provided subject to the disclaimer at the end of this document.
SUSE Linux Enterprise Server 10 Service Pack 3
This does also happen when swap is turned off. Furthermore, there is a high IO activity, whereas just a small amount of RAM is being used.
A generated crashdump does show the following backtrace:
crash> bt ffff810323e607d0
PID: 198 TASK: ffff810323e607d0 CPU: 1 COMMAND: "kswapd0"
#0 [ffff810323e81c88] schedule at ffffffff802f010b
#1 [ffff810323e81d60] schedule_timeout at ffffffff802f0cac
#2 [ffff810323e81db0] io_schedule_timeout at ffffffff802f04d4
#3 [ffff810323e81de0] blk_congestion_wait at ffffffff801f1e5c
#4 [ffff810323e81e30] balance_pgdat at ffffffff8016c2b8
#5 [ffff810323e81ee0] kswapd at ffffffff8016cbe6
#6 [ffff810323e81f50] kernel_thread at ffffffff8010bec6
This bug has been fixed and released with kernel version 18.104.22.168-0.74.7.
To fix this issue, update the kernel to the above release or a posterior one.
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- Document ID:7007279
- Creation Date: 01-Dec-2010
- Modified Date:03-Mar-2020
- SUSE Linux Enterprise Server
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