Your message dated Tue, 16 Feb 2016 21:30:59 +0100
with message-id <[email protected]>
and subject line read.2/write.2 etc. is fixed now
has caused the Debian Bug report #630029,
regarding read/write/readv/writev/sendfile.2: undocumented cap on number of
bytes read/written
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
630029: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=630029
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
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)
([email protected]) (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
--- End Message ---
--- Begin Message ---
Version: 4.04-1
Hi,
this bug has been fixed in manpages, thanks for reporting.
Regards,
Tobias
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--- End Message ---
