https://github.com/torvalds/linux
There've been reports of problems with CONFIG_PREEMPT=y and the high floating point partition. This is caused by the possibility of preemption and rescheduling on a different processor while saving or restioirng the high partition. The only places where the FPU state is touched are in ptrace, in switch_to(), and where handling a floating-point exception. In switch_to() preemption is off. So it's only in trap.c and ptrace.c that we need to prevent preemption. Here is a patch that adds commentary to make the conditions clear, and adds appropriate preempt_{en,dis}able() calls to make it so. In trap.c I use preempt_enable_no_resched(), as we're about to return to user space where the preemption flag will be checked anyway. Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Download a directory from the Software Heritage Vault
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Cook and download a revision from the Software Heritage Vault
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Take a new snapshot of a software origin
If the archived software origin currently browsed is not synchronized with its upstream version (for instance when new commits have been issued), you can explicitly request Software Heritage to take a new snapshot of it.
Use the form below to proceed. Once a request has been submitted and accepted, it will be processed as soon as possible. You can then check its processing state by visiting this dedicated page.![swh spinner](/static/img/swh-spinner.gif)
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[PATCH] ia64: fix floating-point preemption problem
File | Mode | Size |
---|---|---|
Documentation | ||
arch | ||
crypto | ||
drivers | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
scripts | ||
security | ||
sound | ||
usr | ||
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 87.1 KB |
MAINTAINERS | -rw-r--r-- | 55.9 KB |
Makefile | -rw-r--r-- | 43.2 KB |
README | -rw-r--r-- | 13.6 KB |
REPORTING-BUGS | -rw-r--r-- | 2.9 KB |
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...