Comments (3)
Thank you a lot for reporting this issue.
AFAIK, FUSE does not support O_DIRECT.
https://sourceforge.net/p/fuse/mailman/message/27377600/
hanwen/go-fuse#146
So maybe we should support non-FUSE inspector as well (kprobes? NBD? iSCSI?)
PTAL @mitake
from namazu.
If you are just interesting in injecting an error or non-interruptible sleeps (i.e. makes whole the system sleep, not single LWP), I suggest using "guru"-mode SystemTap
PTAL @mitake what do you suggest for injecting interruptible sleeps for filesystem operations, with support for O_DIRECT?
from namazu.
@AkihiroSuda I think the approach based on block device (nbd, iSCSI, qemu, etc) is too costly because correspondence between file accesses and block requests will be hard to be analyzed. kprobe based approach would be suitable for the case.
from namazu.
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