Date: Fri, 30 Oct 2020 10:51:43 -0400 From: Mark Johnston <markj@freebsd.org> To: Mateusz Guzik <mjguzik@gmail.com> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r367165 - head/sys/fs/tmpfs Message-ID: <20201030145143.GB60293@raichu> In-Reply-To: <CAGudoHGBMFoeOKwZWq2%2B1xC9924Xi2AEt4a1zYgwa_EA3HzAkA@mail.gmail.com> References: <202010301407.09UE7Phw060731@repo.freebsd.org> <CAGudoHGBMFoeOKwZWq2%2B1xC9924Xi2AEt4a1zYgwa_EA3HzAkA@mail.gmail.com>
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On Fri, Oct 30, 2020 at 03:08:32PM +0100, Mateusz Guzik wrote: > On 10/30/20, Mateusz Guzik <mjg@freebsd.org> wrote: > > Author: mjg > > Date: Fri Oct 30 14:07:25 2020 > > New Revision: 367165 > > URL: https://svnweb.freebsd.org/changeset/base/367165 > > > > Log: > > tmpfs: change tmpfs dirent zone into a malloc type > > > > It is 64 bytes. > > > > Right now malloc has only power-of-2 zones but I'm looking into > changing that. The allocator itself trivially extends to multiply of > 16, but stat collection needs reworking. Sums of consecutive powers of 2 also works well. That is, 16, 16 + 8, 32, 32 + 16, ... When I last looked I didn't see very many places that would benefit, at least outside of ZFS. Probably the main one is CAM CCBs, and that'll be helped by https://reviews.freebsd.org/D26844 .
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