CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2026/04/09 20:03:40
Modified files:
sys/kern : vfs_biomem.c
Log message:
sys/vfs_biomem: add missed atop() in buf_alloc_pages()
bufbackoff() operates in pages, but size at this call site was a byte
count; the old loop therefore asked for far too much backoff and
compared reclaimed pages against bytes.
On a low memory machine that made the NOWAIT retry path much less likely
to succeed, so the code dropped into the WAITOK allocation below and
slept.
Using atop() puts the units back in line; backoff can now satisfy the
intended request, and the subsequent NOWAIT retry again has a realistic
chance of success. The WAITOK path remains possible, but it should be
reached less often.
OK deraadt@, beck@
