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| author | Chang Huaixin <huaixin.chx@alibaba-inc.com> | 2014-10-16 22:33:24 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-10-16 22:37:57 +0200 |
| commit | 4d544e3bdb12f8e48f61e7f2270b253a48c69e00 (patch) | |
| tree | f5fef7fc107d9eefc13afc01c6db9ad50810c57f /drivers/pcmcia | |
| parent | Input: alps - fix v4 button press recognition (diff) | |
| download | linux-4d544e3bdb12f8e48f61e7f2270b253a48c69e00.tar.xz linux-4d544e3bdb12f8e48f61e7f2270b253a48c69e00.zip | |
Input: xen-kbdfront - free grant table entry in xenkbd_disconnect_backend
xenkbd_disconnect_backend doesn't free grant table entry. This bug affects
live migration.
xenkbd_disconnect_backend uses gnttab_end_foreign_access_ref to handle
grant table entry which doesn't really free an entry.
Thus every time we do xenkbd_resume, grant table entry increses by one. As
an grant table entry occupies 8 bytes, an grant table page has at most 512
entries. Every 512 times we do xenkdb_resume, grant table pages increses by
one.
After around 3500 times of live migration, grant table pages will increase
by 7, causing too many pages to populate and hitting max_pages limit when
assigning pages.Thus assign_pages will fail, so will live migration.
Signed-off-by: Chang Huaixin <huaixin.chx@alibaba-inc.com>
Acked-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/pcmcia')
0 files changed, 0 insertions, 0 deletions