8547e28bd5
23233-hvm-cr-access.patch 23234-svm-decode-assist-base.patch 23235-svm-decode-assist-crs.patch 23236-svm-decode-assist-invlpg.patch 23238-svm-decode-assist-insn-fetch.patch 23303-cpufreq-misc.patch 23304-amd-oprofile-strings.patch 23305-amd-fam15-xenoprof.patch 23306-amd-fam15-vpmu.patch 23334-amd-fam12+14-vpmu.patch 23338-vtd-force-intremap.patch - fate#310957 - Update to Xen 4.1.1-rc1 c/s 23064 - xentrace: dynamic tracebuffer allocation xen-unstable.xentrace.dynamic_tbuf.patch xen-unstable.xentrace.empty_t_info_pages.patch xen-unstable.xentrace.verbose.patch xen-unstable.xentrace.no_gdprintk.patch xen-unstable.xentrace.comments.patch xen-unstable.xentrace.printk_prefix.patch xen-unstable.xentrace.remove_debug_printk.patch xen-unstable.xentrace.t_info_pages-formula.patch xen-unstable.xentrace.register_cpu_notifier-boot_time.patch xen-unstable.xentrace.t_info_page-overflow.patch xen-unstable.xentrace.t_info_first_offset.patch xen-unstable.xentrace.data_size__read_mostly.patch xen-unstable.xentrace.__insert_record-dst-type.patch OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=124
53 lines
2.1 KiB
Diff
53 lines
2.1 KiB
Diff
xenpaging: correct dropping pages to avoid full ring buffer
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Doing a one-way channel from Xen to xenpaging is not possible with the
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current ring buffer implementation. xenpaging uses the mem_event ring
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buffer, which expects request/response pairs to make progress. The
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previous patch, which tried to establish a one-way communication from
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Xen to xenpaging, stalled the guest once the buffer was filled up with
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requests. Correct page-dropping by taking the slow path and let
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p2m_mem_paging_resume() consume the response from xenpaging. This makes
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room for yet another request/response pair and avoids hanging guests.
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Signed-off-by: Olaf Hering <olaf@aepfle.de>
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---
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tools/xenpaging/xenpaging.c | 22 +++++++++++-----------
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1 file changed, 11 insertions(+), 11 deletions(-)
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Index: xen-4.1.1-testing/tools/xenpaging/xenpaging.c
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===================================================================
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--- xen-4.1.1-testing.orig/tools/xenpaging/xenpaging.c
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+++ xen-4.1.1-testing/tools/xenpaging/xenpaging.c
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@@ -653,19 +653,19 @@ int main(int argc, char *argv[])
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ERROR("Error populating page");
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goto out;
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}
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+ }
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- /* Prepare the response */
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- rsp.gfn = req.gfn;
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- rsp.p2mt = req.p2mt;
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- rsp.vcpu_id = req.vcpu_id;
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- rsp.flags = req.flags;
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+ /* Prepare the response */
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+ rsp.gfn = req.gfn;
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+ rsp.p2mt = req.p2mt;
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+ rsp.vcpu_id = req.vcpu_id;
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+ rsp.flags = req.flags;
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- rc = xenpaging_resume_page(paging, &rsp, 1);
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- if ( rc != 0 )
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- {
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- ERROR("Error resuming page");
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- goto out;
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- }
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+ rc = xenpaging_resume_page(paging, &rsp, 1);
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+ if ( rc != 0 )
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+ {
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+ ERROR("Error resuming page");
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+ goto out;
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}
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/* Evict a new page to replace the one we just paged in */
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