Re: FAILED: patch "[PATCH] mptcp: pm: don't try to create sf if alloc failed" failed to apply to 5.15-stable tree

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Hi Greg,

On 12/08/2024 14:39, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
> 
> The patch below does not apply to the 5.15-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@xxxxxxxxxxxxxxx>.
> 
> To reproduce the conflict and resubmit, you may use the following commands:
> 
> git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
> git checkout FETCH_HEAD
> git cherry-pick -x cd7c957f936f8cb80d03e5152f4013aae65bd986
> # <resolve conflicts, build, test, etc.>
> git commit -s
> git send-email --to '<stable@xxxxxxxxxxxxxxx>' --in-reply-to '2024081246-rinse-rockslide-346f@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
> 
> Possible dependencies:
> 
> cd7c957f936f ("mptcp: pm: don't try to create sf if alloc failed")
> c95eb32ced82 ("mptcp: pm: reduce indentation blocks")
> 528cb5f2a1e8 ("mptcp: pass addr to mptcp_pm_alloc_anno_list")
> 77e4b94a3de6 ("mptcp: update userspace pm infos")
> 24430f8bf516 ("mptcp: add address into userspace pm list")
> fb00ee4f3343 ("mptcp: netlink: respect v4/v6-only sockets")
> 80638684e840 ("mptcp: get sk from msk directly")
> 5ccecaec5c1e ("mptcp: fix locking in mptcp_nl_cmd_sf_destroy()")
> 76a13b315709 ("mptcp: invoke MP_FAIL response when needed")
> d9fb797046c5 ("mptcp: Do not traverse the subflow connection list without lock")
> d42f9e4e2384 ("mptcp: Check for orphaned subflow before handling MP_FAIL timer")
> d7e6f5836038 ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net")
> 
> thanks,
> 
> greg k-h
> 
> ------------------ original commit in Linus's tree ------------------
> 
> From cd7c957f936f8cb80d03e5152f4013aae65bd986 Mon Sep 17 00:00:00 2001
> From: "Matthieu Baerts (NGI0)" <matttbe@xxxxxxxxxx>
> Date: Wed, 31 Jul 2024 13:05:56 +0200
> Subject: [PATCH] mptcp: pm: don't try to create sf if alloc failed
> 
> It sounds better to avoid wasting cycles and / or put extreme memory
> pressure on the system by trying to create new subflows if it was not
> possible to add a new item in the announce list.

I think it is better not to backport this patch to v5.15: the
dependencies list is quite big, and the fix is probably not worth it: in
case of memory pressure, we don't try to do more actions (because they
will fail as well).

Cheers,
Matt
-- 
Sponsored by the NGI0 Core fund.





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