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Replace cv_{timed}wait_sig with cv_{timed}wait_idle where appropriate

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There are a number of places where cv_?_sig is used simply for
accounting purposes but the surrounding code has no ability to
cope with actually receiving a signal. On FreeBSD it is possible
to send signals to individual kernel threads so this could
enable undesirable behavior.

This patch adds routines on Linux that will do the same idle
accounting as _sig without making the task interruptible. On
FreeBSD cv_*_idle  are all aliases for cv_*

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #10843
This commit is contained in:
Matthew Macy
2020-09-03 20:04:09 -07:00
committed by Brian Behlendorf
parent fd20a81b9a
commit 36f36610c3
11 changed files with 73 additions and 25 deletions
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include/sys/zfs_context.h
+4
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@@ -325,11 +325,15 @@ extern void cv_signal(kcondvar_t *cv);
extern void cv_broadcast(kcondvar_t *cv);
#define cv_timedwait_io(cv, mp, at) cv_timedwait(cv, mp, at)
#define cv_timedwait_idle(cv, mp, at) cv_timedwait(cv, mp, at)
#define cv_timedwait_sig(cv, mp, at) cv_timedwait(cv, mp, at)
#define cv_wait_io(cv, mp) cv_wait(cv, mp)
#define cv_wait_idle(cv, mp) cv_wait(cv, mp)
#define cv_wait_io_sig(cv, mp) cv_wait_sig(cv, mp)
#define cv_timedwait_sig_hires(cv, mp, t, r, f) \
cv_timedwait_hires(cv, mp, t, r, f)
#define cv_timedwait_idle_hires(cv, mp, t, r, f) \
cv_timedwait_hires(cv, mp, t, r, f)
/*
* Thread-specific data