Date: Thu, 19 Apr 2012 15:45:44 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Sushanth Rai <sushanth_rai@yahoo.com> Cc: alc@freebsd.org, freebsd-hackers@freebsd.org Subject: Re: mlockall() on freebsd 7.2 + amd64 returns EAGAIN Message-ID: <20120419124544.GJ2358@deviant.kiev.zoral.com.ua> In-Reply-To: <1334792265.20401.YahooMailClassic@web180012.mail.gq1.yahoo.com> References: <1334601684.58522.YahooMailClassic@web180001.mail.gq1.yahoo.com> <1334792265.20401.YahooMailClassic@web180012.mail.gq1.yahoo.com>
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--ZlrxixA2Sx//Vzpg Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Apr 18, 2012 at 04:37:45PM -0700, Sushanth Rai wrote: > Wiring entire address space seems to have interesting side effect. The > libc memory allocator calls madvise() to free the dirty unused pages, > which does nothing when the pages are wired. The allocator unmaps only > when entire chunk is free (default size of 1MB). That leaves lots for > free pages which cannot reclaimed even when the system is under memory > pressure. > Yes, and I would argue that this is the proper interpretation of the wire request. --ZlrxixA2Sx//Vzpg Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (FreeBSD) iEYEARECAAYFAk+QCPgACgkQC3+MBN1Mb4iJdwCferb9scNqKy/DdASUAjY1lkA6 X6MAnA1JL5mHcJKMqedLj+rR3exP/b/C =ayHp -----END PGP SIGNATURE----- --ZlrxixA2Sx//Vzpg--
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