0f796dd004
Update to v4.1.0. Also includes other major packaging changes as follows: There is a new package maintenance workflow - see README.PACKAGING for details. The sibling packages qemu-linux-user and qemu-testsuite are now created with the Build Service's MultiBuild feature. This also necessitates combining the qemu-linux-user changelog content back into qemu's. Luckily the delta there is quite small. Note that the qemu spec file is now that much busier, but added section markers should help reduce the confusion. Also qemu is being enabled for RISCV host compatibility, so some changes are related to that as well. OBS-URL: https://build.opensuse.org/request/show/730437 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=487
40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
From: Alexander Graf <agraf@suse.de>
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Date: Wed, 14 Jan 2015 01:32:11 +0100
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Subject: 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 4ed9b89ab2d9c4e6d805ea47c2b2..697c989885ca8aa4dd1185b780df 100644
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--- a/util/thread-pool.c
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+++ b/util/thread-pool.c
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@@ -307,7 +307,12 @@ 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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