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9675 memory leak from cpupart_create #669
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ikozhukhov
approved these changes
Jul 27, 2018
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
In usr/src/uts/common/disp/cpupart.c, cpupart_create() allocates a
buffer and assigns it to the cp_lgrploads member of a cpupart_t struct:
pp->cp_nlgrploads = lgrp_plat_max_lgrps();
pp->cp_lgrploads = kmem_zalloc(sizeof (lpl_t) * pp->cp_nlgrploads,
KM_SLEEP);
The function then goes on to call cpupart_lpl_initialize(), which
allocates an identical buffer and assigns it to the same field, leaking
the original buffer:
sz = cp->cp_nlgrploads = lgrp_plat_max_lgrps();
cp->cp_lgrploads = kmem_zalloc(sizeof (lpl_t) * sz, KM_SLEEP);
We should be able to just remove the initial allocation.
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Reviewed by: George Wilson george.wilson@delphix.com
Reviewed by: Pavel Zakharov pavel.zakharov@delphix.com
In usr/src/uts/common/disp/cpupart.c, cpupart_create() allocates a buffer and assigns it to the
cp_lgrploads member of a cpupart_t struct:
pp->cp_nlgrploads = lgrp_plat_max_lgrps();
pp->cp_lgrploads = kmem_zalloc(sizeof (lpl_t) * pp->cp_nlgrploads,
KM_SLEEP);
The function then goes on to call cpupart_lpl_initialize(), which allocates an identical buffer and
assigns it to the same field, leaking the original buffer:
sz = cp->cp_nlgrploads = lgrp_plat_max_lgrps();
cp->cp_lgrploads = kmem_zalloc(sizeof (lpl_t) * sz, KM_SLEEP);
We should be able to just remove the initial allocation.
Upstream bug: DLPX-56280