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b3b73b8e6d
Once flow cache gets removed the mtu initialisation happens for every skb that gets an xfrm attached, so this lock starts to show up in perf. It is not obvious why this lock is required -- the caller holds reference on the state struct, type->destructor is only called from the state gc worker (all state structs on gc list must have refcount 0). xfrm_init_state already has been called (else private data accessed by type->get_mtu() would not be set up). So just remove the lock -- the race on the state (DEAD?) doesn't matter (could change right after dropping the lock too). Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.