Date: Sun, 13 Oct 2013 13:47:17 +0400 From: Dmitry Sivachenko <trtrmitya@gmail.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: "hackers@freebsd.org" <hackers@freebsd.org> Subject: Re: mmap() question Message-ID: <FA37F470-BA6D-48F5-9002-8CBB8E2E48A3@gmail.com> In-Reply-To: <20131012141440.GN41229@kib.kiev.ua> References: <95E0B821-BF9B-4EBF-A1E5-1DDCBB1C3D1B@gmail.com> <20131011051702.GE41229@kib.kiev.ua> <A5E3C0A2-F0D5-47B1-8992-4B9DA347C275@gmail.com> <20131012095919.GI41229@kib.kiev.ua> <EB09D2E7-F870-4A3D-A071-83BD83C6985B@gmail.com> <20131012141440.GN41229@kib.kiev.ua>
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On 12.10.2013, at 18:14, Konstantin Belousov <kostikbel@gmail.com> wrote: >> >> First I tried with some swap space configured. The OS started to swap out my process after it reached about 20GB which is also not what I expected: what is the reason to swap out regions of read-only mmap()ed files? Is it the expected behaviour? >> > How did you concluded that the pages from your r/o mappings were paged out ? > VM never does this. Only anonymous memory could be written to swap file, > including the shadow pages for the writeable COW mappings. I suspect that > you have another 20GB of something used on the machine meantime. > Yes, sorry, I tried again with swap space configured and it is really some other processes which are swapping out: sshd, other user's shells, etc. >> >>> >>> Below is the prototype patch, against HEAD. It is not applicable to >>> stable, please use HEAD kernel for test. >> I tried your patch with stable/10 system and I can confirm that my process is not killed anymore because of OOM.home | help
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