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authorMing Lei <ming.lei@canonical.com>2015-09-17 19:06:28 +0300
committerJens Axboe <axboe@fb.com>2015-09-17 19:07:04 +0300
commit994518799930fc363d47cb7cf0d1abed1790bf16 (patch)
tree419b2187d773572e67ae96c06b56d3e571f34307 /drivers/net/ethernet/broadcom/bnx2x
parent52cc6eead9095e2faf2ec7afc013aa3af1f01ac5 (diff)
downloadlinux-994518799930fc363d47cb7cf0d1abed1790bf16.tar.xz
block: fix bounce_end_io
When bio bounce is involved, one new bio and its biovecs are cloned from the comming bio, which can be one fast-cloned bio from upper layer(such as dm). So it is obviously wrong to assume the start index of the coming( original) bio's io vector is zero, which can be any value between 0 and (bi_max_vecs - 1), especially in case of bio split. This patch fixes Fedora's booting oops on i386, often with the following kernel log together: > [ 9.026738] systemd[1]: Switching root. > [ 9.036467] systemd-journald[149]: Received SIGTERM from PID 1 > (systemd). > [ 9.082262] BUG: Bad page state in process kworker/u5:1 pfn:372ac > [ 9.083989] page:f3d32ae0 count:0 mapcount:0 mapping:f2252178 > index:0x16a > [ 9.085755] flags: 0x40020021(locked|lru|mappedtodisk) > [ 9.087284] page dumped because: page still charged to cgroup > [ 9.088772] bad because of flags: > [ 9.089731] flags: 0x21(locked|lru) > [ 9.090818] page->mem_cgroup:f2c3e400 Reported-by: Josh Boyer <jwboyer@fedoraproject.org> Tested-by: Adam Williamson <awilliam@redhat.com> Cc: Ming Lin <mlin@kernel.org> Cc: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnx2x')
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