commit: 5412c3bcd8b34b6477f791a8684e00a404c82135 Author: Alessandro Barbieri <lssndrbarbieri <AT> gmail <DOT> com> AuthorDate: Tue Aug 3 08:06:00 2021 +0000 Commit: Alessandro Barbieri <lssndrbarbieri <AT> gmail <DOT> com> CommitDate: Tue Aug 3 08:06:00 2021 +0000 URL: https://gitweb.gentoo.org/repo/proj/guru.git/commit/?id=5412c3bc
sys-kernel/xpmem: initial import Signed-off-by: Alessandro Barbieri <lssndrbarbieri <AT> gmail.com> sys-kernel/xpmem/Manifest | 1 + sys-kernel/xpmem/metadata.xml | 55 ++++++++++++++++++++++++++ sys-kernel/xpmem/xpmem-2.6.3_p20210217.ebuild | 56 +++++++++++++++++++++++++++ 3 files changed, 112 insertions(+) diff --git a/sys-kernel/xpmem/Manifest b/sys-kernel/xpmem/Manifest new file mode 100644 index 000000000..2cac8e390 --- /dev/null +++ b/sys-kernel/xpmem/Manifest @@ -0,0 +1 @@ +DIST xpmem-2.6.3_p20210217.tar.gz 55906 BLAKE2B 609f9b18529e06504c02cbee3383355e161ebcad98d558ff518d125cf4b795fd32f0b6eba8e23c67e4ccf6eb2b6686be21594335a48fcdee71344ee063af65e3 SHA512 fb09d7120686957d02c29c7058e6b1e1de35637252c4942efcd722306117384cb6bdc8d3e175c26d3de56c36dd6946f53fa341473a7ad660d68847a23d331bb3 diff --git a/sys-kernel/xpmem/metadata.xml b/sys-kernel/xpmem/metadata.xml new file mode 100644 index 000000000..31c9905e2 --- /dev/null +++ b/sys-kernel/xpmem/metadata.xml @@ -0,0 +1,55 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd";> +<pkgmetadata> + <longdescription lang="en"> +This is an experimental version of XPMEM based on a version provided by +Cray and uploaded to https://code.google.com/p/xpmem. This version supports +any kernel 3.12 and newer. Keep in mind there may be bugs and this version +may cause kernel panics, code crashes, eat your cat, etc. + +XPMEM is a Linux kernel module that enables a process to map the +memory of another process into its virtual address space. Source code +can be obtained by cloning the Git repository, original Mercurial +repository or by downloading a tarball from the link above. + +The XPMEM API has three main functions: + +xpmem_make() +xpmem_get() +xpmem_attach() + +A process calls xpmem_make() to export a region of its virtual address +space. Other processes can then attach to the region by calling +xpmem_get() and xpmem_attach(). After a memory region is attached, it +is accessed via direct loads and stores. This enables upper-level +protocols such as MPI and SHMEM to perform single-copy address-space +to address-space transfers, completely at user-level. + +Note, there is a limitation to the usage of an attached region. Any +system call that will call get_user_pages() on the region from the +non-owning process with get EFAULT. This include pthread mutexes +and condition variable, and SYS V semaphores. We intend to address +this limitation in a future release. + +XPMEM regions are free to have "holes" in them, meaning virtual memory +regions that are not allocated. This makes XPMEM somewhat more +flexible than mmap(). A process could, for example, export a region +via XPMEM starting at address 0 and extending 4 GB. Accesses to +allocated (valid) virtual addresses in this region proceed normally, +and pages are mapped between address spaces on demand. A segfault will +occur if the source process or any other process mapping the region +tries to access an unallocated (invalid) virtual address in the +region. + </longdescription> + <maintainer type="person"> + <email>[email protected]</email> + <name>Alessandro Barbieri</name> + </maintainer> + <use> + <flag name="modules">Build the kernel module</flag> + </use> + <upstream> + <bugs-to>https://github.com/hjelmn/xpmem/issues</bugs-to> + <remote-id type="github">hjelmn/xpmem</remote-id> + </upstream> +</pkgmetadata> diff --git a/sys-kernel/xpmem/xpmem-2.6.3_p20210217.ebuild b/sys-kernel/xpmem/xpmem-2.6.3_p20210217.ebuild new file mode 100644 index 000000000..f03a6b4e0 --- /dev/null +++ b/sys-kernel/xpmem/xpmem-2.6.3_p20210217.ebuild @@ -0,0 +1,56 @@ +# Copyright 1999-2020 Gentoo Authors +# Distributed under the terms of the GNU General Public License v2 + +EAPI=7 + +inherit autotools linux-mod + +MODULES_OPTIONAL_USE="modules" +MY_REV="242eaa1eca92567c2118afe21e37cafc524f9166" + +DESCRIPTION="Linux Cross-Memory Attach" +HOMEPAGE="https://github.com/hjelmn/xpmem"; +SRC_URI="https://github.com/hjelmn/xpmem/archive/${MY_REV}.tar.gz -> ${P}.tar.gz" +S="${WORKDIR}/${PN}-${MY_REV}" + +LICENSE="LGPL-2.1" +SLOT="0" +KEYWORDS="~amd64" +IUSE="+modules" + +MODULE_NAMES="xpmem(misc:${WORKDIR}/module/kernel:${WORKDIR}/module/kernel)" +BUILD_TARGETS="all" + +src_prepare() { + default + AT_M4DIR="m4" eautoreconf + if use modules; then + cp -r "${S}" "${WORKDIR}/module" || die + fi +} + +src_configure() { + local myconf=( + --disable-kernel-module + ) + econf "${myconf[@]}" + + if use modules; then + pushd "${WORKDIR}/module" || die + econf + popd || die + fi +} + +src_compile() { + default + use modules && linux-mod_src_compile +} + +src_install() { + einstalldocs + default + use modules && linux-mod_src_install + find "${ED}" -name '*.la' -delete || die + find "${ED}" -name '*.a' -delete || die +}
