From 3d1908d762c6e91e0b6fe2e235e85bdf397d092d Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Fri, 2 Jun 2017 17:02:43 +0200
Subject: kernel: don't preempt pager during fscache reclaim

the fscache image is the main source for pages once
the page freelist got exhausted, so delay scheduling
until they release the fscache lock.
---
 sys/src/9/port/proc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/src/9/port/proc.c b/sys/src/9/port/proc.c
index e9a299c20..5a98ac747 100644
--- a/sys/src/9/port/proc.c
+++ b/sys/src/9/port/proc.c
@@ -141,6 +141,7 @@ sched(void)
 		if(up->state != Moribund)
 		if(up->delaysched < 20
 		|| palloc.Lock.p == up
+		|| fscache.Lock.p == up
 		|| procalloc.Lock.p == up){
 			up->delaysched++;
  			delayedscheds++;
-- 
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