Date: Tue, 11 Jan 2005 01:19:43 +0000 (UTC) From: Ian Dowse <iedowse@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/usb usb_mem.c Message-ID: <200501110119.j0B1Jh64026220@repoman.freebsd.org>
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iedowse 2005-01-11 01:19:43 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_4)
sys/dev/usb usb_mem.c
Log:
MFC: 1.6; When searching for a suitable block of memory on the free
list, skip blocks that are too big by a factor of two or greater.
This avoids some cases of extremely inefficient memory use that can
occur when large (e.g. 64k) blocks on the free list get used when
allocating a 4k chunk of 64-byte fragments. Because fragments have
their own free list, the 60k difference got lost forever every time.
Revision Changes Path
1.5.4.2 +2 -1 src/sys/dev/usb/usb_mem.c
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