git bisect start
# good: [8f1afde57dca27e6542b0b8e7c87750f3d6367bf] 2.20.13 release
git bisect good 8f1afde57dca27e6542b0b8e7c87750f3d6367bf
# bad: [f57ce6ef9ca735d5cb428b2f12f1f9413a70506a] 2.21.15 release
git bisect bad f57ce6ef9ca735d5cb428b2f12f1f9413a70506a
# bad: [007a95d62fc998b3a558bb80310c82256d00b0bb] sna: Drop a local variable only used to hold a constant
git bisect bad 007a95d62fc998b3a558bb80310c82256d00b0bb
# bad: [2113f7f440dd2f10e80f0bb3bd5cd155f7e19098] sna: Free the SHM pixmaps after b266ae6f6f
git bisect bad 2113f7f440dd2f10e80f0bb3bd5cd155f7e19098
# bad: [58770b7d6401d2d81f7fee1c8c0e788d44149712] man: Describe Option "AccelMethod"
git bisect bad 58770b7d6401d2d81f7fee1c8c0e788d44149712
# good: [a8a99428c14c8aed2082853cc60d0f98a1fa2d86] sna/dri: Unknown generations are given the max value and presume i965_dri.so
git bisect good a8a99428c14c8aed2082853cc60d0f98a1fa2d86
# bad: [39d6c65f437d7877c1647b7ecf45e76daabc76a6] sna/dri: Query current msc before use
git bisect bad 39d6c65f437d7877c1647b7ecf45e76daabc76a6
# bad: [65a8c23ca1bc8e2ebd087027a30358704d4bf11c] sna: Only flush at the low apeture watermark if idle
git bisect bad 65a8c23ca1bc8e2ebd087027a30358704d4bf11c
# bad: [b82bfcb54a6af0d1ee17806ef94d9da504cad606] sna/gen6+: Cache the scanout targets separately to avoid override PTE caching
git bisect bad b82bfcb54a6af0d1ee17806ef94d9da504cad606
# bad: [b9afb9cb614d2ad44330eed03b3f577a35184a88] sna/gen4: Avoid emitting URB_FENCE across a cache-line
git bisect bad b9afb9cb614d2ad44330eed03b3f577a35184a88
# bad: [6f675eeaeade4728af566891b2afbe5b44fbdc2e] 2.20.15 release
git bisect bad 6f675eeaeade4728af566891b2afbe5b44fbdc2e
# bad: [37eb7343be1aeeb90a860096756603a577df1a77] sna/gen5: Inspired by gen4, reorder the flushing
git bisect bad 37eb7343be1aeeb90a860096756603a577df1a77
# first bad commit: [37eb7343be1aeeb90a860096756603a577df1a77] sna/gen5: Inspired by gen4, reorder the flushing