From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id DB0D238300B8 for ; Tue, 31 May 2022 22:12:20 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org DB0D238300B8 Received: from mail-qv1-f69.google.com (mail-qv1-f69.google.com [209.85.219.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-663-omuC9nS3Oky9xXaGjgOFAQ-1; Tue, 31 May 2022 18:12:19 -0400 X-MC-Unique: omuC9nS3Oky9xXaGjgOFAQ-1 Received: by mail-qv1-f69.google.com with SMTP id i6-20020a0cd846000000b0046262337c65so97341qvj.20 for ; Tue, 31 May 2022 15:12:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:references:from:organization:in-reply-to :content-transfer-encoding; bh=7IufGryu+6KxF9YIFeaHZ/fAuqQ49t3+nHwogfNEkco=; b=8AotN45BlfE+5DHKbh/DGHaMXREvElBPG5JnBjnHvGPlzLWgkagzjbEhtcBhnL734v Pghn+DkABv7mlAt0DpVtJ3mLRNWS2KXgtSKuDvaehMTLnfdYYUBZaVXoqnnpVGID2ARs A62G4677JW2AnjLJsf70nWjYcN/uD48n7TGVJXMLCkLuYw4wW+Toga8XIwFuFsGWODtc DiRxiTRUWRlbngDBqR3fC8PRwCvJ/ssd8ap/tvSRZ/E3ORksNYtrm1QLIhcPXiLorigH P4ovuK8xH/LX4JEOzm6MnLc2KZmRVR3FKGDUPn0azfyL0WrE7fZb9e73ItopH2/ppiTV /vsg== X-Gm-Message-State: AOAM532laZle2HGdjKrW8uc3FgsW+Bqlzk4Aazv4BdRzMeAdTGjMisZy bcKGC+7aWpq2s7CoB1CWT5RjPmyCizfPCFyn5qJ6vve/lutq6upxwMlgQL178R0xWUoORI3bRK0 lAoW7DRpyDObbo5WbmfxJ X-Received: by 2002:ac8:4707:0:b0:2ed:b56:5531 with SMTP id f7-20020ac84707000000b002ed0b565531mr48928075qtp.148.1654035138138; Tue, 31 May 2022 15:12:18 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwT1Tf84GbyYr82w5yXO/Q97vHotx31xZWmjQ+CuWVROkn3hCFIHgWz73glCr4mlwx8vYnmFg== X-Received: by 2002:ac8:4707:0:b0:2ed:b56:5531 with SMTP id f7-20020ac84707000000b002ed0b565531mr48928056qtp.148.1654035137767; Tue, 31 May 2022 15:12:17 -0700 (PDT) Received: from [192.168.0.241] (135-23-175-80.cpe.pppoe.ca. [135.23.175.80]) by smtp.gmail.com with ESMTPSA id f130-20020a379c88000000b006a346e0f653sm101840qke.15.2022.05.31.15.12.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 31 May 2022 15:12:16 -0700 (PDT) Message-ID: Date: Tue, 31 May 2022 18:12:16 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.0 Subject: Re: [PATCH v2 07/15] linux: Add process_mrelease To: Adhemerval Zanella , libc-alpha@sourceware.org References: <20220207174431.360355-1-adhemerval.zanella@linaro.org> <20220207174431.360355-8-adhemerval.zanella@linaro.org> From: Carlos O'Donell Organization: Red Hat In-Reply-To: <20220207174431.360355-8-adhemerval.zanella@linaro.org> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-14.8 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, NICE_REPLY_A, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 31 May 2022 22:12:24 -0000 On 2/7/22 12:44, Adhemerval Zanella via Libc-alpha wrote: > It was added on Linux 5.15 (884a7e5964e06ed93c7771c0d7cf19c09a8946f1) > to allow release the memory of a dying process from the context of the > caller. As requested for patch 6, if you can split 6 and 7 out we can review them as a set. Suggest: Added in Linux 5.15 (884a7e5964e06ed93c7771c0d7cf19c09a8946f1), the new syscalls allows a caller to free the memory of a dying target process. > --- > NEWS | 3 + > sysdeps/unix/sysv/linux/Makefile | 1 + > sysdeps/unix/sysv/linux/Versions | 1 + > sysdeps/unix/sysv/linux/aarch64/libc.abilist | 1 + > sysdeps/unix/sysv/linux/alpha/libc.abilist | 1 + > sysdeps/unix/sysv/linux/arc/libc.abilist | 1 + > sysdeps/unix/sysv/linux/arm/be/libc.abilist | 1 + > sysdeps/unix/sysv/linux/arm/le/libc.abilist | 1 + > sysdeps/unix/sysv/linux/bits/mman_ext.h | 2 + > sysdeps/unix/sysv/linux/csky/libc.abilist | 1 + > sysdeps/unix/sysv/linux/hppa/libc.abilist | 1 + > sysdeps/unix/sysv/linux/i386/libc.abilist | 1 + > sysdeps/unix/sysv/linux/ia64/libc.abilist | 1 + > .../sysv/linux/m68k/coldfire/libc.abilist | 1 + > .../unix/sysv/linux/m68k/m680x0/libc.abilist | 1 + > .../sysv/linux/microblaze/be/libc.abilist | 1 + > .../sysv/linux/microblaze/le/libc.abilist | 1 + > .../sysv/linux/mips/mips32/fpu/libc.abilist | 1 + > .../sysv/linux/mips/mips32/nofpu/libc.abilist | 1 + > .../sysv/linux/mips/mips64/n32/libc.abilist | 1 + > .../sysv/linux/mips/mips64/n64/libc.abilist | 1 + > sysdeps/unix/sysv/linux/nios2/libc.abilist | 1 + > sysdeps/unix/sysv/linux/or1k/libc.abilist | 1 + > .../linux/powerpc/powerpc32/fpu/libc.abilist | 1 + > .../powerpc/powerpc32/nofpu/libc.abilist | 1 + > .../linux/powerpc/powerpc64/be/libc.abilist | 1 + > .../linux/powerpc/powerpc64/le/libc.abilist | 1 + > .../unix/sysv/linux/riscv/rv32/libc.abilist | 1 + > .../unix/sysv/linux/riscv/rv64/libc.abilist | 1 + > .../unix/sysv/linux/s390/s390-32/libc.abilist | 1 + > .../unix/sysv/linux/s390/s390-64/libc.abilist | 1 + > sysdeps/unix/sysv/linux/sh/be/libc.abilist | 1 + > sysdeps/unix/sysv/linux/sh/le/libc.abilist | 1 + > .../sysv/linux/sparc/sparc32/libc.abilist | 1 + > .../sysv/linux/sparc/sparc64/libc.abilist | 1 + > sysdeps/unix/sysv/linux/syscalls.list | 1 + > .../unix/sysv/linux/tst-process_mrelease.c | 72 +++++++++++++++++++ > .../unix/sysv/linux/x86_64/64/libc.abilist | 1 + > .../unix/sysv/linux/x86_64/x32/libc.abilist | 1 + > 39 files changed, 113 insertions(+) > create mode 100644 sysdeps/unix/sysv/linux/tst-process_mrelease.c > > diff --git a/NEWS b/NEWS > index 47cab5d5c1..7893643f83 100644 > --- a/NEWS > +++ b/NEWS > @@ -16,6 +16,9 @@ Major new features: > * On Linux, the process_madvise has been added. It is has the same > functionality as madvise but using a pidfd of the target process. > > +* On Linux, the process_mrelease has been added. It allows release the > + memory of a dying process from the context of the caller. Suggest: ... It allows a caller to release the memory of a dying process. The release of the memory is carried out in the context of the caller, using the caller's CPU affinity, and priority with CPU usage accounted to the caller. > + > Deprecated and removed features, and other changes affecting compatibility: > > [Add deprecations, removals and changes affecting compatibility here] > diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile > index 2c7c425ab7..a4faa4a415 100644 > --- a/sysdeps/unix/sysv/linux/Makefile > +++ b/sysdeps/unix/sysv/linux/Makefile > @@ -128,6 +128,7 @@ tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \ > tst-scm_rights \ > tst-epoll \ > tst-pidfd \ > + tst-process_mrelease \ OK. > # tests > > # process_madvise requires CAP_SYS_ADMIN. > diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions > index c13a3c4fe7..66a995d3dc 100644 > --- a/sysdeps/unix/sysv/linux/Versions > +++ b/sysdeps/unix/sysv/linux/Versions > @@ -304,6 +304,7 @@ libc { > pidfd_getfd; > pidfd_send_signal; > process_madvise; > + process_mrelease; OK. > } > GLIBC_PRIVATE { > # functions used in other libraries > diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist > index 4d8e64ce04..027a1cf531 100644 > --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist > +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist > @@ -2620,3 +2620,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist > index 36f3129257..703fcf5deb 100644 > --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist > +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist > @@ -2717,6 +2717,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _IO_fprintf F > GLIBC_2.4 _IO_printf F > GLIBC_2.4 _IO_sprintf F > diff --git a/sysdeps/unix/sysv/linux/arc/libc.abilist b/sysdeps/unix/sysv/linux/arc/libc.abilist > index 2a1e346d4b..28c52dcbac 100644 > --- a/sysdeps/unix/sysv/linux/arc/libc.abilist > +++ b/sysdeps/unix/sysv/linux/arc/libc.abilist > @@ -2381,3 +2381,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/arm/be/libc.abilist b/sysdeps/unix/sysv/linux/arm/be/libc.abilist > index 25de8a018c..c3adade814 100644 > --- a/sysdeps/unix/sysv/linux/arm/be/libc.abilist > +++ b/sysdeps/unix/sysv/linux/arm/be/libc.abilist > @@ -500,6 +500,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _Exit F > GLIBC_2.4 _IO_2_1_stderr_ D 0xa0 > GLIBC_2.4 _IO_2_1_stdin_ D 0xa0 > diff --git a/sysdeps/unix/sysv/linux/arm/le/libc.abilist b/sysdeps/unix/sysv/linux/arm/le/libc.abilist > index e9cf9b1593..33a90a248e 100644 > --- a/sysdeps/unix/sysv/linux/arm/le/libc.abilist > +++ b/sysdeps/unix/sysv/linux/arm/le/libc.abilist > @@ -497,6 +497,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _Exit F > GLIBC_2.4 _IO_2_1_stderr_ D 0xa0 > GLIBC_2.4 _IO_2_1_stdin_ D 0xa0 > diff --git a/sysdeps/unix/sysv/linux/bits/mman_ext.h b/sysdeps/unix/sysv/linux/bits/mman_ext.h > index 20960e7df5..97234a7adf 100644 > --- a/sysdeps/unix/sysv/linux/bits/mman_ext.h > +++ b/sysdeps/unix/sysv/linux/bits/mman_ext.h > @@ -30,4 +30,6 @@ extern __ssize_t process_madvise (int __pid_fd, const struct iovec* __iov, > unsigned __flags) > __THROW; > > +extern int process_mrelease (int pidfd, unsigned int flags) __THROW; OK. > + > #endif /* __USE_GNU */ > diff --git a/sysdeps/unix/sysv/linux/csky/libc.abilist b/sysdeps/unix/sysv/linux/csky/libc.abilist > index 66c2f28c43..23a00cfc0b 100644 > --- a/sysdeps/unix/sysv/linux/csky/libc.abilist > +++ b/sysdeps/unix/sysv/linux/csky/libc.abilist > @@ -2656,3 +2656,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist > index 527880dc06..93e1068208 100644 > --- a/sysdeps/unix/sysv/linux/hppa/libc.abilist > +++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist > @@ -2605,6 +2605,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist > index 1497b8a2c3..356b05cae4 100644 > --- a/sysdeps/unix/sysv/linux/i386/libc.abilist > +++ b/sysdeps/unix/sysv/linux/i386/libc.abilist > @@ -2789,6 +2789,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist > index abe351d0b4..58e51aae4b 100644 > --- a/sysdeps/unix/sysv/linux/ia64/libc.abilist > +++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist > @@ -2555,6 +2555,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist > index 130f7a6b04..ea4a19cbc2 100644 > --- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist > +++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist > @@ -501,6 +501,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _Exit F > GLIBC_2.4 _IO_2_1_stderr_ D 0x98 > GLIBC_2.4 _IO_2_1_stdin_ D 0x98 > diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist > index cf59edb383..217717859c 100644 > --- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist > +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist > @@ -2732,6 +2732,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist > index f1b927d63d..0e373d5c89 100644 > --- a/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist > +++ b/sysdeps/unix/sysv/linux/microblaze/be/libc.abilist > @@ -2705,3 +2705,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist > index 9bb7c76f94..569d3e5556 100644 > --- a/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist > +++ b/sysdeps/unix/sysv/linux/microblaze/le/libc.abilist > @@ -2702,3 +2702,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist > index 03e7820eea..7ccc7f93eb 100644 > --- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist > +++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist > @@ -2697,6 +2697,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist > index 3d70dc1140..d197f0bd5d 100644 > --- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist > +++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist > @@ -2695,6 +2695,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist > index 5498e2ee30..4a8e857e53 100644 > --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist > +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist > @@ -2703,6 +2703,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist > index dbebed5d36..e0a170c030 100644 > --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist > +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist > @@ -2606,6 +2606,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist > index a0bfa86068..6f809245c9 100644 > --- a/sysdeps/unix/sysv/linux/nios2/libc.abilist > +++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist > @@ -2744,3 +2744,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/or1k/libc.abilist b/sysdeps/unix/sysv/linux/or1k/libc.abilist > index 7d09a03d0e..1fc9e27c27 100644 > --- a/sysdeps/unix/sysv/linux/or1k/libc.abilist > +++ b/sysdeps/unix/sysv/linux/or1k/libc.abilist > @@ -2127,3 +2127,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist > index db8fc28e75..01ba1dd9ec 100644 > --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist > +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist > @@ -2759,6 +2759,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _IO_fprintf F > GLIBC_2.4 _IO_printf F > GLIBC_2.4 _IO_sprintf F > diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist > index e6cbb83b26..263231a396 100644 > --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist > +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist > @@ -2792,6 +2792,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _IO_fprintf F > GLIBC_2.4 _IO_printf F > GLIBC_2.4 _IO_sprintf F > diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist > index 162241fc68..2c3c3af8fb 100644 > --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist > +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist > @@ -2514,6 +2514,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _IO_fprintf F > GLIBC_2.4 _IO_printf F > GLIBC_2.4 _IO_sprintf F > diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist > index 2845ee2015..4138874b38 100644 > --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist > +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist > @@ -2816,3 +2816,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist > index 277f6fbe95..5feae3245f 100644 > --- a/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist > +++ b/sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist > @@ -2383,3 +2383,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist > index 6f2a4d4504..3e6a4ae5ec 100644 > --- a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist > +++ b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist > @@ -2583,3 +2583,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist > index bfb317488d..93c7b79b51 100644 > --- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist > +++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist > @@ -2757,6 +2757,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _IO_fprintf F > GLIBC_2.4 _IO_printf F > GLIBC_2.4 _IO_sprintf F > diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist > index beef516979..b663fabeba 100644 > --- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist > +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist > @@ -2551,6 +2551,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _IO_fprintf F > GLIBC_2.4 _IO_printf F > GLIBC_2.4 _IO_sprintf F > diff --git a/sysdeps/unix/sysv/linux/sh/be/libc.abilist b/sysdeps/unix/sysv/linux/sh/be/libc.abilist > index c326c9320a..abebf77944 100644 > --- a/sysdeps/unix/sysv/linux/sh/be/libc.abilist > +++ b/sysdeps/unix/sysv/linux/sh/be/libc.abilist > @@ -2612,6 +2612,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/sh/le/libc.abilist b/sysdeps/unix/sysv/linux/sh/le/libc.abilist > index 704f489a8e..afd8a42895 100644 > --- a/sysdeps/unix/sysv/linux/sh/le/libc.abilist > +++ b/sysdeps/unix/sysv/linux/sh/le/libc.abilist > @@ -2609,6 +2609,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist > index b9e8a34153..56feda817d 100644 > --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist > +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist > @@ -2752,6 +2752,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 _IO_fprintf F > GLIBC_2.4 _IO_printf F > GLIBC_2.4 _IO_sprintf F > diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist > index e921a8dd76..00cc5b24d1 100644 > --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist > +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist > @@ -2578,6 +2578,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list > index 6942a16d0c..289a2c820a 100644 > --- a/sysdeps/unix/sysv/linux/syscalls.list > +++ b/sysdeps/unix/sysv/linux/syscalls.list > @@ -44,6 +44,7 @@ pidfd_getfd EXTRA pidfd_getfd i:iiU pidfd_getfd > pivot_root EXTRA pivot_root i:ss pivot_root > pidfd_send_signal EXTRA pidfd_send_signal i:iiPU pidfd_send_signal > process_madvise EXTRA process_madvise i:iPiiU process_madvise > +process_mrelease EXTRA process_mrelease i:iU process_mrelease OK. > query_module EXTRA query_module i:sipip __compat_query_module query_module@GLIBC_2.0:GLIBC_2.23 > quotactl EXTRA quotactl i:isip quotactl > remap_file_pages - remap_file_pages i:pUiUi __remap_file_pages remap_file_pages > diff --git a/sysdeps/unix/sysv/linux/tst-process_mrelease.c b/sysdeps/unix/sysv/linux/tst-process_mrelease.c > new file mode 100644 > index 0000000000..eadb7fc73b > --- /dev/null > +++ b/sysdeps/unix/sysv/linux/tst-process_mrelease.c > @@ -0,0 +1,72 @@ > +/* Basic tests for Linux process_mrelease. > + Copyright (C) 2022 Free Software Foundation, Inc. > + This file is part of the GNU C Library. > + > + The GNU C Library is free software; you can redistribute it and/or > + modify it under the terms of the GNU Lesser General Public > + License as published by the Free Software Foundation; either > + version 2.1 of the License, or (at your option) any later version. > + > + The GNU C Library is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + Lesser General Public License for more details. > + > + You should have received a copy of the GNU Lesser General Public > + License along with the GNU C Library; if not, see > + . */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +static void > +subprocess (void) > +{ > + pause (); > + _exit (0); > +} > + > +static int > +do_test (void) > +{ > + { > + int r = process_mrelease (-1, 0); > + TEST_COMPARE (r, -1); > + if (errno == ENOSYS) > + FAIL_UNSUPPORTED ("kernel does not support process_mrelease, " > + "skipping test"); > + TEST_COMPARE (errno, EBADF); > + } > + > + pid_t pid = xfork (); > + if (pid == 0) > + subprocess (); > + May we please tes process_mrelease returns EBADF for an invalid pidfd? > + int pidfd = pidfd_open (pid, 0); > + TEST_VERIFY (pidfd != -1); > + > + /* The syscall only succeedes if the target process is exiting and there > + is no guarantee that calling if after pidfd_send_signal will not error > + (since the process might already been reaped by OS). So just check if Suggest: (since the process might have already been reaped by the OS). > + it does fail when the process is stll running. */ > + TEST_COMPARE (process_mrelease (pidfd, 0), -1); > + TEST_COMPARE (errno, EINVAL); OK. > + > + TEST_COMPARE (pidfd_send_signal (pidfd, SIGKILL, NULL, 0), 0); > + { > + siginfo_t info; > + int r = waitid (P_PIDFD, pidfd, &info, WEXITED); > + TEST_COMPARE (r, 0); > + TEST_COMPARE (info.si_status, SIGKILL); > + TEST_COMPARE (info.si_code, CLD_KILLED); > + } May we please test process_mrelease returns ESRCH for the now dead pidfd target? That covers the life-cycle parts of the API we can test. > + > + return 0; > +} > + > +#include > diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist > index 8948dc2705..4e729bdf56 100644 > --- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist > +++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist > @@ -2529,6 +2529,7 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F > GLIBC_2.4 __confstr_chk F > GLIBC_2.4 __fgets_chk F > GLIBC_2.4 __fgets_unlocked_chk F > diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist > index 0988804f24..b5d7b9f1ed 100644 > --- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist > +++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist > @@ -2635,3 +2635,4 @@ GLIBC_2.36 pidfd_getfd F > GLIBC_2.36 pidfd_open F > GLIBC_2.36 pidfd_send_signal F > GLIBC_2.36 process_madvise F > +GLIBC_2.36 process_mrelease F -- Cheers, Carlos.