Messages in this thread | | | Date | Mon, 14 Aug 2023 09:55:03 +0200 | From | David Hildenbrand <> | Subject | Re: [PATCH] kernel/fork: stop playing lockless games for exe_file replacement |
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On 13.08.23 14:33, Mateusz Guzik wrote: > xchg originated in 6e399cd144d8 ("prctl: avoid using mmap_sem for > exe_file serialization"). While the commit message does not explain > *why* the change, clearly the intent was to use mmap_sem less in this > codepath. I found the original submission [1] which ultimately claims it > cleans things up.
More details are apparently in v1 of that patch:
https://lore.kernel.org/lkml/1424979417.10344.14.camel@stgolabs.net/
Regarding your patch: adding more mmap_write_lock() where avoidable, I'm not so sure.
Your patch doesn't look (to me) like it is removing a lot of complexity.
-- Cheers,
David / dhildenb
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