fbc8207b73
Update to qemu 3.1.0-rc5. Is almost certainly the last rc, so should be same as 3.1.0 final. Putting into devel project 'early' because of SLE and Leap needs, not to get into Factory early. Look for the final 3.1 within a week. OBS-URL: https://build.opensuse.org/request/show/655897 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=433
41 lines
1.3 KiB
Diff
41 lines
1.3 KiB
Diff
From f15645e3c37bbb274a4c0edbbec9cac7386ec660 Mon Sep 17 00:00:00 2001
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From: Alexander Graf <agraf@suse.de>
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Date: Wed, 14 Jan 2015 01:32:11 +0100
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Subject: [PATCH] AIO: Reduce number of threads for 32bit hosts
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On hosts with limited virtual address space (32bit pointers), we can very
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easily run out of virtual memory with big thread pools.
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Instead, we should limit ourselves to small pools to keep memory footprint
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low on those systems.
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This patch fixes random VM stalls like
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(process:25114): GLib-ERROR **: gmem.c:103: failed to allocate 1048576 bytes
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on 32bit ARM systems for me.
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Signed-off-by: Alexander Graf <agraf@suse.de>
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---
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util/thread-pool.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/util/thread-pool.c b/util/thread-pool.c
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index 610646d131..2e34e9846d 100644
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--- a/util/thread-pool.c
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+++ b/util/thread-pool.c
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@@ -308,7 +308,12 @@ static void thread_pool_init_one(ThreadPool *pool, AioContext *ctx)
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qemu_mutex_init(&pool->lock);
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qemu_cond_init(&pool->worker_stopped);
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qemu_sem_init(&pool->sem, 0);
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- pool->max_threads = 64;
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+ if (sizeof(pool) == 4) {
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+ /* 32bit systems run out of virtual memory quickly */
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+ pool->max_threads = 4;
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+ } else {
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+ pool->max_threads = 64;
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+ }
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pool->new_thread_bh = aio_bh_new(ctx, spawn_thread_bh_fn, pool);
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QLIST_INIT(&pool->head);
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