Eduard Zingerman <eddyz87@xxxxxxxxx> wrote: > On Fri, 2024-09-27 at 21:50 +0100, David Howells wrote: > > Is it possible for you to turn on some tracepoints and access the traces? > > Granted, you probably need to do the enablement during boot. > > Yes, sure, tell me what you need. If you look here: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=netfs-fixes you can see some patches I've added. If you can try this branch or cherry pick: netfs: Fix write oops in generic/346 (9p) and generic/074 (cifs) netfs: Advance iterator correctly rather than jumping it netfs: Use a folio_queue allocation and free functions netfs: Add a tracepoint to log the lifespan of folio_queue structs And then turn on the following "netfs" tracepoints: read,sreq,rreq,failure,write,write_iter,folio,folioq,progress,donate which can be done by: echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_read/enable echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_rreq/enable echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_sreq/enable echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_failure/enable echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_write/enable echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_write_iter/enable echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_folio/enable echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_folioq/enable echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_progress/enable echo 1 >/sys/kernel/debug/tracing/events/netfs/netfs_donate/enable or through trace-cmd. > Alternatively I can pack this thing in a dockerfile, so that you would > be able to reproduce locally (but that would have to wait till my evening). I don't have Docker set up, so I'm not sure how easy that would be for me to use. Thanks, David
