[PATCH] linux: Fix CPU usage bug in console fd flushing
Mikhail Gusarov
dottedmag at dottedmag.net
Sun Nov 14 08:06:36 PST 2010
Twas brillig at 16:59:54 14.11.2010 UTC+01 when thierry.vignaud at gmail.com did gyre and gimble:
TV> From 20e32420a2f75b58603eb1578c151d63e6b2e8ac Mon Sep 17 00:00:00 2001
TV> From: Adam Jackson <ajax at redhat.com>
TV> Date: Wed, 25 Aug 2010 11:06:38 -0400
TV> Subject: [PATCH] linux: Fix CPU usage bug in console fd flushing
TV> If the vt gets a vhangup from under us, then the tty will appear ready
TV> in select(), but trying to tcflush() it will return -EIO, so we'll spin
TV> around at 100% CPU for no reason. Notice this condition and unregister
TV> the handler if it happens.
TV> Signed-off-by: Adam Jackson <ajax at redhat.com>
Reviewed-by: Mikhail Gusarov <dottedmag at dottedmag.net>
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