| commit | a6225b5b1ff1b3fe60b0e7ef98bc040a111d265f | |
| author | Matthew Dillon <dillon@apollo.backplane.com> | |
| Mon, 28 Nov 2016 18:41:53 +0000 (28 10:41 -0800) | ||
| committer | Matthew Dillon <dillon@apollo.backplane.com> | |
| Mon, 28 Nov 2016 18:41:53 +0000 (28 10:41 -0800) | ||
| tree | e25a0a8bd904575df6493261445a39760e1f3c4c | treesnapshot (tar.gz zip) |
| parent | 93d7266760cd54ddd6c33317d44791ba6f7c9930 | commitdiff |
kernel - Fix deadlock in vm_page_repurpose()
* vm_page_repurpose() was hard+soft busying the underlying VM page,
which can deadlock against putpages or other I/O.
* Only hard-busy the page, then add an SBUSY test to the failure case
(we don't want to repurpose a page undergoing I/O after all!).
* vm_page_repurpose() was hard+soft busying the underlying VM page,
which can deadlock against putpages or other I/O.
* Only hard-busy the page, then add an SBUSY test to the failure case
(we don't want to repurpose a page undergoing I/O after all!).
| sys/vm/vm_page.c | diffblobblamehistory |