Package: linux-2.6 Version: 2.6.39-1+b1 Severity: normal
In 2.6.39 (and maybe some earlier versions= of Linux, sendfile supports file->file copies. Unfortunately, it doesn't handle files near 2GB size correctly and returns early. For example, here is a call that tries to copy a >3GB file: [pid 8171] sendfile(18, 17, [0], 3569424384) = 2147479552 Linux always seems to stop copying at 0x7FFFF000 bytes, without apparent reason (such as disk full or another error). This happens with a 64 bit kernel btw., so this is not a 32 bit issue either. This causes many programs to report a "short write", as this is an error condition with similar syscalls on files (such as write(2)). I think sendfile should either not attempt to copy files, or copy the requested number of bytes unless an error occurs (such as disk full or a read error). Otherwise programs always need to retry with another syscall, to see if sendfile returned "just so" or there was an actual problem. -- Package-specific info: ** Version: Linux version 2.6.39-1-amd64 (Debian 2.6.39-1) (buildd_amd64-bra...@buildd.debian.org) (gcc version 4.4.6 (Debian 4.4.6-3) ) #1 SMP Tue May 24 14:34:19 UTC 2011 ** Tainted: PMO (4113) * Proprietary module has been loaded. * System experienced a machine check exception. * Out-of-tree module has been loaded. -- System Information: Debian Release: 6.0.1 APT prefers stable APT policy: (990, 'stable'), (500, 'unstable'), (500, 'testing'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 2.6.39-1-amd64 (SMP w/4 CPU cores) Locale: LANG=C, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages linux-image-2.6.39-1-amd64 depends on: ii debconf [debconf-2.0] 1.5.36.1 Debian configuration management sy ii initramfs-tools [linux-initra 0.99 tools for generating an initramfs ii linux-base 3 Linux image base package ii module-init-tools 3.12-1 tools for managing Linux kernel mo Versions of packages linux-image-2.6.39-1-amd64 recommends: ii firmware-linux-free 3 Binary firmware for various driver Versions of packages linux-image-2.6.39-1-amd64 suggests: ii grub-pc 1.98+20100804-14 GRand Unified Bootloader, version ii lilo 1:22.8-10 LInux LOader - The Classic OS load pn linux-doc-2.6.39 <none> (no description available) Versions of packages linux-image-2.6.39-1-amd64 is related to: ii firmware-bnx2 0.28 Binary firmware for Broadcom NetXt pn firmware-bnx2x <none> (no description available) pn firmware-ipw2x00 <none> (no description available) pn firmware-ivtv <none> (no description available) pn firmware-iwlwifi <none> (no description available) pn firmware-linux <none> (no description available) pn firmware-linux-nonfree <none> (no description available) pn firmware-qlogic <none> (no description available) pn firmware-ralink <none> (no description available) pn xen-hypervisor <none> (no description available) -- debconf information: linux-image-2.6.39-1-amd64/prerm/removing-running-kernel-2.6.39-1-amd64: true * linux-image-2.6.39-1-amd64/postinst/missing-firmware-2.6.39-1-amd64: linux-image-2.6.39-1-amd64/postinst/ignoring-ramdisk: linux-image-2.6.39-1-amd64/postinst/depmod-error-initrd-2.6.39-1-amd64: false -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
