On Tue, 2020-01-07 at 16:35 +0000, Kumar Ranjan wrote: > We are using Debian 9.11 (Stretch) and facing issues with > multipathing behavior. > > When I run "multipath -ll", I see io_setup failed messages. > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > Jan 06 16:37:30 | io_setup failed > > > When I increase the asynchronous I/O contexts, I see multipath hangs > for 30 seconds to come back to the prompt. > fs.aio-max-nr = 1048576
The explanation and analysis from the below bug report should apply to this bug too. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=827322 -- Ritesh Raj Sarraf | http://people.debian.org/~rrs Debian - The Universal Operating System
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