On 5 September 2014 03:03, Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx> wrote: > The following series implements bugfix of PTE formats for swap and file entries > and changes PTE bit position to fixed, which is more better for analysing of > tracer and HW debugger logs. > > Hardcoded bits positions and offsets in PTE effectively causes a miss of > relationship between PTE format for TLB and PTE formats for swap and file > entries. This patch series introduces a symbolic relation between both and > also fixes a current mismatch of formats. It can crash kernel or application > in heavy paging environment. > > Fixed bit positions helps much in analysing of tracer and HW debugger logs and > improves performance and code size a little due to absence of variable masks > in kernel. Well, this is definitely above my low-level-arch skills to review this. FWIW kernel with these patches still boots on my BCM5357B0 (router with 32 MiB of RAM). This pgtable* reminds me of highmem support for bcm47xx, unfortunately I don't have any device with 256 MiB of RAM to test it. -- Rafał
