David Teigland ca66d52032 io: use sync io if aio fails ... io_setup() for aio may fail if a system has reached the aio request limit. In this case, fall back to using sync io. Also, lvm use of aio can be disabled entirely with config setting global/use_aio=0. The system limit for aio requests can be seen from /proc/sys/fs/aio-max-nr The current usage of aio requests can be seen from /proc/sys/fs/aio-nr The system limit for aio requests can be increased by setting fs.aio-max-nr using sysctl. Also add last-byte limit to the sync io code.		2018-11-20 09:13:20 -06:00
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label.c	io: use sync io if aio fails	2018-11-20 09:13:20 -06:00
label.h	metadata: prevent writing beyond metadata area	2018-10-29 16:53:17 -05:00